Perhaps we see the following differently, Dan P and or Jerry S.
My understanding is that faith takes God's Word as His Word as to what He asserts He requires via His Word.
God's Word to Israel was basically I Am the LORD YOUR God - do this; that; the other and don't do this other this; that; the other.
In other words, that was HIS "thou shalt/thou shalt not" to that nation.
What did faith do under THAT Dispensation?
It took THAT as HIS Word to THEM.
In which case, THEIR doing "those things which saith the law" was PRECEEDED BY FAITH - that THIS is what the LORD OUR God has commanded - and BECAUSE WE BELIEVE that He is OUR God Who has COMMANDED us to BELIEVE that He IS OUR God, and to THEREFORE do what He has COMMNANDED, WE will THEREFORE DO those things.
One would have to be blind not to see that FAITH PRECEEDS THEIR doing.
The issue was the HEART issue of FAITH...
John 5:44 How can ye believe, which receive honour one of another, and seek not the honour that cometh from God only?
Romans 2:25 For circumcision verily profiteth, if thou keep the law: but if thou be a breaker of the law, thy circumcision is made uncircumcision.
But again, merely DOING was NOT faith.
Romans 2:28 For he is not a Jew, which is one outwardly; neither is that circumcision, which is outward in the flesh: 2:29 But he is a Jew, which is one inwardly; and circumcision is that of the heart, in the spirit, and not in the letter; whose praise is not of men, but of God.
Matthew 23:23 Woe unto you, scribes and Pharisees, hypocrites! for ye pay tithe of mint and anise and cummin, and have omitted the weightier matters of the law, judgment, mercy, and faith: these ought ye to have done, and not to leave the other undone. 23:24 Ye blind guides, which strain at a gnat, and swallow a camel. 23:25 Woe unto you, scribes and Pharisees, hypocrites! for ye make clean the outside of the cup and of the platter, but within they are full of extortion and excess. 23:26 Thou blind Pharisee, cleanse first that which is within the cup and platter, that the outside of them may be clean also. 23:27 Woe unto you, scribes and Pharisees, hypocrites! for ye are like unto whited sepulchres, which indeed appear beautiful outward, but are within full of dead men's bones, and of all uncleanness. 23:28 Even so ye also outwardly appear righteous unto men, but within ye are full of hypocrisy and iniquity. 23:29 Woe unto you, scribes and Pharisees, hypocrites! because ye build the tombs of the prophets, and garnish the sepulchres of the righteous, 23:30 And say, If we had been in the days of our fathers, we would not have been partakers with them in the blood of the prophets. 23:31 Wherefore ye be witnesses unto yourselves, that ye are the children of them which killed the prophets. 23:32 Fill ye up then the measure of your fathers. 23:33 Ye serpents, ye generation of vipers, how can ye escape the damnation of hell? 23:34 Wherefore, behold, I send unto you prophets, and wise men, and scribes: and some of them ye shall kill and crucify; and some of them shall ye scourge in your synagogues, and persecute them from city to city: 23:35 That upon you may come all the righteous blood shed upon the earth, from the blood of righteous Abel unto the blood of Zacharias son of Barachias, whom ye slew between the temple and the altar. 23:36 Verily I say unto you, All these things shall come upon this generation. 23:37 O Jerusalem, Jerusalem, thou that killest the prophets, and stonest them which are sent unto thee, how often would I have gathered thy children together, even as a hen gathereth her chickens under her wings, and ye would not! 23:38 Behold, your house is left unto you desolate. 23:39 For I say unto you, Ye shall not see me henceforth, till ye shall say, Blessed is he that cometh in the name of the Lord.
Acts 7:51 Ye stiffnecked and uncircumcised in heart and ears, ye do always resist the Holy Ghost: as your fathers did, so do ye. 7:52 Which of the prophets have not your fathers persecuted? and they have slain them which shewed before of the coming of the Just One; of whom ye have been now the betrayers and murderers: 7:53 Who have received the law by the disposition of angels, and have not kept it.
John 5:44 How can ye believe, which receive honour one of another, and seek not the honour that cometh from God only? 5:45 Do not think that I will accuse you to the Father: there is one that accuseth you, even Moses, in whom ye trust. 5:46 For had ye believed Moses, ye would have believed me: for he wrote of me. 5:47 But if ye believe not his writings, how shall ye believe my words?
John 9:34 They answered and said unto him, Thou wast altogether born in sins, and dost thou teach us? And they cast him out. 9:35 Jesus heard that they had cast him out; and when he had found him, he said unto him, Dost thou believe on the Son of God? 9:36 He answered and said, Who is he, Lord, that I might believe on him? 9:37 And Jesus said unto him, Thou hast both seen him, and it is he that talketh with thee. 9:38 And he said, Lord, I believe. And he worshipped him.
His worshipping Him FOLLOWED his believing on Him.
What was all that based on?
What was it all about?
Believing ISRAEL'S PROPHESIED Grace...
Matthew 13:10 And the disciples came, and said unto him, Why speakest thou unto them in parables? 13:11 He answered and said unto them, Because it is given unto you to know the mysteries of the kingdom of heaven, but to them it is not given. 13:12 For whosoever hath, to him shall be given, and he shall have more abundance: but whosoever hath not, from him shall be taken away even that he hath. 13:13 Therefore speak I to them in parables: because they seeing see not; and hearing they hear not, neither do they understand. 13:14 And in them is fulfilled the prophecy of Esaias, which saith, By hearing ye shall hear, and shall not understand; and seeing ye shall see, and shall not perceive: 13:15 For this people's heart is waxed gross, and their ears are dull of hearing, and their eyes they have closed; lest at any time they should see with their eyes and hear with their ears, and should understand with their heart, and should be converted, and I should heal them. 13:16 But blessed are your eyes, for they see: and your ears, for they hear. 13:17 For verily I say unto you, That many prophets and righteous men have desired to see those things which ye see, and have not seen them; and to hear those things which ye hear, and have not heard them.
See that?
Details concerning His Propheised kingdom's grace (mysteries of THEIR coming kingdom's restoration) was given to those who had faith.
In short - to those within the nation ISRAEL who were NOT in UNBELIEF like "the rest" of THEIR nation - those of THAT nation in UNBELIEF who REMAINED THEIR BELIEVING Remnant.
That is what a remnant is - what is left of a thing.
The issue was one of FAITH.
The issue was one of THE HEART.
Luke 2:25 And, behold, there was a man in Jerusalem, whose name was Simeon; and the same man was just and devout, waiting for the consolation of Israel: and the Holy Ghost was upon him. 2:26 And it was revealed unto him by the Holy Ghost, that he should not see death, before he had seen the Lord's Christ. 2:27 And he came by the Spirit into the temple: and when the parents brought in the child Jesus, to do for him after the custom of the law, 2:28 Then took he him up in his arms, and blessed God, and said, 2:29 Lord, now lettest thou thy servant depart in peace, according to thy word: 2:30 For mine eyes have seen thy salvation, 2:31 Which thou hast prepared before the face of all people; 2:32 A light to lighten the Gentiles, and the glory of thy people Israel. 2:33 And Joseph and his mother marvelled at those things which were spoken of him.
Luke 2:34 And Simeon blessed them, and said unto Mary his mother, Behold, this child is set for the fall and rising again of many in Israel; and for a sign which shall be spoken against; 2:35 (Yea, a sword shall pierce through thy own soul also,) that the thoughts of many hearts may be revealed.
Luke 2:36 And there was one Anna, a prophetess, the daughter of Phanuel, of the tribe of Aser: she was of a great age, and had lived with an husband seven years from her virginity; 2:37 And she was a widow of about fourscore and four years, which departed not from the temple, but served God with fastings and prayers night and day. 2:38 And she coming in that instant gave thanks likewise unto the Lord, and spake of him to all them that looked for redemption in Jerusalem.
Hebrews 11:1 Now faith is the substance of things hoped for, the evidence of things not seen. 11:2 For by it the elders obtained a good report. 11:3 Through faith we understand that the worlds were framed by the word of God, so that things which are seen were not made of things which do appear. 11:4 By faith Abel offered unto God a more excellent sacrifice than Cain, by which he obtained witness that he was righteous, God testifying of his gifts: and by it he being dead yet speaketh. 11:5 By faith Enoch was translated that he should not see death; and was not found, because God had translated him: for before his translation he had this testimony, that he pleased God. 11:6 But without faith it is impossible to please him: for he that cometh to God must believe that he is, and that he is a rewarder of them that diligently seek him.