The two issues of denominations and grace-only are very fundamental and lie at the heart of digressions from the Lord and His truth. This study is regarding the issue of grace. 

Let's look at the assertion that "restricting to only five acts of worship is law-keeping, legalism, and not grace." It is inconsistent with the scriptures taken in whole, to think that grace dispenses with law. Noah "found grace in the eyes of God" , yet he spent one hundred twenty years building an ark in obedience to God's commands. Joshua was told that God gave him Jericho, yet Joshua and the Israelites had to march thirteen times around Jericho, blow the trumpets, shout and observe the restrictions of bounty. When Achan took bounty, he broke the law of God and fell from grace. We are saved by grace through faith--created unto good works (Eph.2:8-10). 

EPH 2:8 For by grace are ye saved through faith; and that not of yourselves: it is the gift of God:
9 Not of works, lest any man should boast.
10 For we are his workmanship, created in Christ Jesus unto good works, which God hath before ordained that we should walk in them.

We are saved by grace (undeserved favor), we are sustained by grace and will enter glory by grace. We are saved by love and mercy but that does not dispense with the necessity of our living faithful to God, in keeping His law. "(1Jn.2:3-5; 5:2,3) 

1JO 2:3 And hereby we do know that we know him, if we keep his commandments.
4 He that saith, I know him, and keepeth not his commandments, is a liar, and the truth is not in him.
5 But whoso keepeth his word, in him verily is the love of God perfected: hereby know we that we are in him. 

1JO 5:2 By this we know that we love the children of God, when we love God, and keep his commandments.
3 For this is the love of God, that we keep his commandments: and his commandments are not grievous.

Grace is commensurate with the gift. If one received the gift of a new car, the fact that he has to sign the title, put in gas and oil, turn the key, observe the laws regulating driving etc. does not dispense that fact that one had received an undeserved gift. There is a great deal of difference in the kind of works mentioned in the Bible. There are "works of the flesh", works of the Law of Moses, works of merit, work of submission and gratitude, etc. I could never earn salvation, never work so as to place God in such debt to me that He would owe me the death of Christ (Rom.5:6-12). 

ROM 5:6 For when we were yet without strength, in due time Christ died for the ungodly.
7 For scarcely for a righteous man will one die: yet peradventure for a good man some would even dare to die.
8 But God commendeth his love toward us, in that, while we were yet sinners, Christ died for us.
9 Much more then, being now justified by his blood, we shall be saved from wrath through him.
10 For if, when we were enemies, we were reconciled to God by the death of his Son, much more, being reconciled, we shall be saved by his life.
11 And not only so, but we also joy in God through our Lord Jesus Christ, by whom we have now received the atonement.
12 Wherefore, as by one man sin entered into the world, and death by sin; and so death passed upon all men, for that all have sinned:

Christ is the "grace of God that bringeth salvation," that "teaches us that we must deny ungodliness and live soberly, righteously and godly" (Ti.2:11,12). 

TIT 2:11 For the grace of God that bringeth salvation hath appeared to all men,
12 Teaching us that, denying ungodliness and worldly lusts, we should live soberly, righteously, and godly, in this present world;

The fact that we must deny ungodliness and live soberly, righteously and godly does not nullify the grace that we receive in Christ. However, the very thing implied is that if we do not "deny ungodliness and live soberly, righteously and godly", we will indeed forfeit the grace extended to us. 

We are saved "by grace through faith" (Eph.2:8,9). 

EPH 2:8 For by grace are ye saved through faith; and that not of yourselves: it is the gift of God:
9 Not of works, lest any man should boast.

But the sort of faith which saves has been qualified by James (Jam 2:14-26). 

JAM 2:14 What doth it profit, my brethren, though a man say he hath faith, and have not works? can faith save him?
15 If a brother or sister be naked, and destitute of daily food,
16 And one of you say unto them, Depart in peace, be ye warmed and filled; notwithstanding ye give them not those things which are needful to the body; what doth it profit?
17 Even so faith, if it hath not works, is dead, being alone.
18 Yea, a man may say, Thou hast faith, and I have works: shew me thy faith without thy works, and I will shew thee my faith by my works.
19 Thou believest that there is one God; thou doest well: the devils also believe, and tremble.
20 But wilt thou know, O vain man, that faith without works is dead? 21 Was not Abraham our father justified by works, when he had offered Isaac his son upon the altar?
22 Seest thou how faith wrought with his works, and by works was faith made perfect?
23 And the scripture was fulfilled which saith, Abraham believed God, and it was imputed unto him for righteousness: and he was called the Friend of God.
24 Ye see then how that by works a man is justified, and not by faith only.
25 Likewise also was not Rahab the harlot justified by works, when she had received the messengers, and had sent them out another way?
26 For as the body without the spirit is dead, so faith without works is dead also.

Note the faith hall of fame in Hebrews (Heb 13). By faith each one acted, worked, obeyed, because they believed God! 

Jesus told us that even faith/belief is a work (Joh.6:29). 

JOH 6:29 Jesus answered and said unto them, This is the work of God, that ye believe on him whom he hath sent.

Faith is derived from hearing (studying, reading) the Word of God. That is something we do, which equals a work. There are no works or deeds of merit that I may check off and say, "Now God, you owe me!" Yet there are conditions to grace as in the cases of Noah, Joshua and a multitude of others. A dad may say, "Son I will give you the farm if you will promise never to grow cotton and always grow peanuts." The farm is a gift even though there are conditions to the gift. The son has not earned the farm, he has only agreed to the conditions of the gift. 

It is by the grace of God that we have the privilege of worshipping Him in spirit and in truth (Joh.4:20-24). 

JOH 4:20 Our fathers worshipped in this mountain; and ye say, that in Jerusalem is the place where men ought to worship.
21 Jesus saith unto her, Woman, believe me, the hour cometh, when ye shall neither in this mountain, nor yet at Jerusalem, worship the Father.
22 Ye worship ye know not what: we know what we worship: for salvation is of the Jews.
23 But the hour cometh, and now is, when the true worshippers shall worship the Father in spirit and in truth: for the Father seeketh such to worship him.
24 God is a Spirit: and they that worship him must worship him in spirit and in truth.

Giving to the support of the Lord's work is a favor that He shares with us in allowing us to share in His work. Paul commanded that the Corinthians "abound in this grace also," regarding their contribution (2Cor.8:1-7). 

2CO 8:1 Moreover, brethren, we do you to wit [ know ] of the grace of God bestowed on the churches of Macedonia;
2 How that in a great trial of affliction the abundance of their joy and their deep poverty abounded unto the riches of their liberality.
3 For to their power, I bear record, yea, and beyond their power they were willing of themselves;
4 Praying us with much intreaty that we would receive the gift, and take upon us the fellowship of the ministering to the saints.
5 And this they did, not as we hoped, but first gave their own selves to the Lord, and unto us by the will of God.
6 Insomuch that we desired Titus, that as he had begun, so he would also finish in you the same grace also.
7 Therefore, as ye abound in every thing, in faith, and utterance, and knowledge, and in all diligence, and in your love to us, see that ye abound in this grace also.

Since when is obedience legalism? If obedience is legalism, how could one disobey God? Obeying God is to do what He says to do, in the way He says to do it, for the purpose He says to do it, when He says to do it. Is Jesus not the author of eternal salvation to all them the obey Him (Heb.5:8,9)? 

HEB 5:8 Though he were a Son, yet learned he obedience by the things which he suffered;
9 And being made perfect, he became the author of eternal salvation unto all them that obey him;

Look again at what Jesus said, (Mat.7:21-24). 

MAT 7:21 Not every one that saith unto me, Lord, Lord, shall enter into the kingdom of heaven; but he that doeth the will of my Father which is in heaven.
22 Many will say to me in that day, Lord, Lord, have we not prophesied in thy name? and in thy name have cast out devils? and in thy name done many wonderful works?
23 And then will I profess unto them, I never knew you: depart from me, ye that work iniquity.
24 Therefore whosoever heareth these sayings of mine, and doeth them, I will liken him unto a wise man, which built his house upon a rock:

The foolish man did not build on the teachings (doctrine) of the Lord. The people then took note that Jesus taught as one having authority (Mat. 28,29). 

MAT 7:28 And it came to pass, when Jesus had ended these sayings, the people were astonished at his doctrine:
29 For he taught them as one having authority, and not as the scribes.

In every dispensation of time, God has always been specific regarding items of worship to Him and has never allowed alterations or substitutions to His requirements. Ask Cain (he might have called Able a legalist). Ask Nadab and Abihu (Lev.10:1,2). 

LEV 10:1 And Nadab and Abihu, the sons of Aaron, took either of them his censer, and put fire therein, and put incense thereon, and offered strange fire before the LORD, which he commanded them not.
2 And there went out fire from the LORD, and devoured them, and they died before the LORD.

Ask Saul (1Sam.15). Read the whole chapter, especially where Saul's own opinion of how to follow God's word is judged (1Sam. 15:22). 

1SA 15:22 And Samuel said, Hath the LORD as great delight in burnt offerings and sacrifices, as in obeying the voice of the LORD? Behold, to obey is better than sacrifice, and to hearken than the fat of rams.

Was Paul a legalist when he re-immersed the people at Ephesus (Ac.19:1-5)? 

ACT 19:1 And it came to pass, that, while Apollos was at Corinth, Paul having passed through the upper coasts came to Ephesus: and finding certain disciples,
2 He said unto them, Have ye received the Holy Ghost since ye believed? And they said unto him, We have not so much as heard whether there be any Holy Ghost.
3 And he said unto them, Unto what then were ye baptized? And they said, Unto John's baptism.
4 Then said Paul, John verily baptized with the baptism of repentance, saying unto the people, that they should believe on him which should come after him, that is, on Christ Jesus.
5 When they heard this, they were baptized in the name of the Lord Jesus.

Paul told the Galatians to do works of service to fulfil the law Christians are under, not the Old Law (Gal. 6:2). 

GAL 6:2 Bear ye one another's burdens, and so fulfil the law of Christ.

The five overt acts of worship outlined in the New Testament are done from the heart, not as a check list of merit. The simplicity of the acts of worship shows the wonderful wisdom of God. While I comply with the commands of God in worship, I have no feelings of restrictions, but of grace that gives me a complete order of worship. My heart would burst if I could not sing and pray and give and commune and be edified. What more could I desire? How could I improve the divine plan? Would I be so presumptive as to think that I could add to, delete from, or alter God's perfect plan for worship and living (Jam.1:25; 2Tim.3:16,17; 2Pet.1:3)? 

JAM 1:25 But whoso looketh into the perfect law of liberty, and continueth therein, he being not a forgetful hearer, but a doer of the work, this man shall be blessed in his deed. 

2TI 3:16 All scripture is given by inspiration of God, and is profitable for doctrine, for reproof, for correction, for instruction in righteousness:
17 That the man of God may be perfect, throughly furnished unto all good works. 

2PE 1:3 According as his divine power hath given unto us all things that pertain unto life and godliness, through the knowledge of him that hath called us to glory and virtue:

To do so -- alter God's perfect plan for worship after the commandments and doctrines of men -- would be "will worship" (Col.2:20-23). 

COL 2:20 Wherefore if ye be dead with Christ from the rudiments of the world, why, as though living in the world, are ye subject to ordinances,
21 (Touch not; taste not; handle not;
22 Which all are to perish with the using;) after the commandments and doctrines of men?
23 Which things have indeed a shew of wisdom in will worship, and humility, and neglecting of the body: not in any honour to the satisfying of the flesh.

Leave out any ingredient and your cake cannot produce the result you desire. Grace is part of the recipe which we find in the New Testament. Works of obedience ARE a part of the salvation recipe, whereas works of merit are NOT. 

Hear the words of Jesus on obedience to the word (Luk. 6:46). 

LUK 6:46 And why call ye me, Lord, Lord, and do not the things which I say?

Let us not presume anything beyond what has been written. This is how Jesus answered the devil's temptations: "It is written", then he quoted the scriptures. Jesus said, (Jn.14:15) "If ye love me, keep my commandments." That is not legalism, that is submission and surrender. 
 

NOTE: The PREVIOUS STUDY addressed the assertion "that the church is just a denomination."