In Galatians 3: 2 there is a distinction between the word of God and the law of Moses: "I would like to learn just one thing from you: Did you receive the Spirit by the works of the law, or by believing what you heard?" Galatians 3:2.
Paul in this text, when he speaks of receiving the Spirit, is not referring to the justification of baptism but to integrity:
"When the apostles in Jerusalem heard that Samaria had accepted the word of God, they sent Peter and John to Samaria. When they arrived, they prayed for the new believers there that they might received the Holy Spirit, because the Holy Spirit had not yet come on any of them; they had simply been baptized in the name of the Lord Jesus. Then Peter and John placed their hands on them, and they received the Holy Spirit." Acts 8:14-17.
Paul tells us to believe in what we hear (the word of God), that is to say, listen with the intention of putting into practice what was received, the law of Moses is for those who live according to the flesh. We cannot receive the spirit by works of the law because we cannot reach the truth. Jesus explains: "I am the way, the truth and the life", John 14:6. The truth rest in the word of God.
The gospels show us a practical case where the Law of Moses is opposed to the Word of God:
"At dawn he appeared again in the temple courts, where all the people gathered around him, and he sat down to teach them. The teachers of the law and the Pharisees brought in a woman caught in adultery. They made her stand before the group and said to Jesus, ´Teacher, this woman was caught in the act of adultery. In the law Moses commanded us to stone such women. Now what do you say?´ They were using this question as a trap, in order to have a basis for accusing him.
But Jesus bent down and started to write on the ground with his finger. When they kept on questioning him, he straightened up and said to them, ´Let any one of you who is without sin be the first to throw a stone at her.´ Again he stooped down and wrote on the ground.
At this, those who heard began to go away one at a time, the older ones first, until only Jesus was left, with the woman still standing there." John 8:1-9
Jesus reminds us of a beatitude, all starts with the listening: "But even more blessed are all who hear the Word of God and put it into practice", Luke 11:28
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