Gal 3:1 O foolish Galatians, who hath bewitched you, that ye should not obey the truth, before whose eyes Jesus Christ hath been evidently set forth, crucified among you?
Gal 3:2 This only would I learn of you, Received ye the Spirit by the works of the law, or by the hearing of faith?
Gal 3:5 He therefore that ministereth to you the Spirit, and worketh miracles among you, doeth he it by the works of the law, or by the hearing of faith?
In Acts 5:32, the Spirit has been given to those who obey God, so obedience to God is part of the way to receive the Spirit, however, Galatians 3:1-5 denies that "works of the law" are part of the way to receive the Spirit, therefore that phrase does not refer to obedience to God. In Romans 3:27-31, Paul contested a law of works with a law of faith, so works of the law are of works, while he said that our faith upholds God's law, so it is of faith and a law that our faith upholds can't be referring to the same thing as the works of the law that are not of faith in Galatians 3:10-11.
According to Deuteronomy 27-28, relying on God's law is the way to be blessed while not relying on it is the way to be cursed, so Galatians 3:10 should not be interpreted as quoting from Deuteronomy 27-28 in order to support a point that is arguing against Deuteronomy 27-28 by saying that relying on God's law is the way to be cursed and not relying on it is the way to avoid being cursed, especially when Paul considered Deuteronomy to be Scripture. Rather the way to come under the curse of not obeying God's law is by not relying on it, so that is why all who instead relying on works of the law come under the curse for not relying on the Book of the Law.
In Galatians 3:11-12, Paul connected a quote from Habakkuk 2:4 saying that the righteous shall live by faith with a quote from Leviticus 18:5 saying that the one who obeys God's law will live by it, so the righteous who are living by faith are the same as those who are living in obedience to God's law while no one is justified before God by works of the law because they are not of faith, unlike the God's law. In Isaiah 51:7, the righteous are those on whose heart is God's law, so again the righteous living by faith does not refer to a manner of living that is not in obedience to it. God is trustworthy, therefore His law is also trustworthy (Psalms 19:7), so relying on God's law is the way to rely on God, it is contradictory to think that God is trustworthy, but that His law is not, and to interpret Galatians 3:10-12 as saying that what God has instructed is not of faith is to deny the faithfulness of God.
In addition, the Spirit has the role of leading us to obey God's law (Ezekiel 36:26-27).
