Exodus 32:14

And the Lord repented of the evil - This is spoken merely after the manner of men who, having formed a purpose, permit themselves to be diverted from it by strong and forcible reasons, and so change their minds relative to their former intentions.

This states a fact which was not revealed to Moses until after his second intercession when he had come down from the mountain and witnessed the sin of the people Exodus 32:30-34. He was then assured that the Lord's love to His ancient people would prevail God is said, in the language of Scripture, to "repent," when His forgiving love is seen by man to blot out the letter of His judgments against sin (2 Samuel 24:16; Joel 2:13; Jonah 3:10, etc.); or when the sin of man seems to human sight to have disappointed the purposes of grace (Genesis 6:6; 1 Samuel 15:35, etc.). The awakened conscience is said to "repent," when, having felt its sin, it feels also the divine forgiveness: it is at this crisis that God, according to the language of Scripture, repents toward the sinner. Thus, the repentance of God made known in and through the One true Mediator reciprocates the repentance of the returning sinner, and reveals to him atonement.

32:14 And the Lord repented of the evil he thought to do - Though he designed to punish them, yet he would not ruin them. See here, the power of prayer, God suffers himself to be prevailed with by humble believing importunity. And see the compassion of God towards poor sinners, and how ready he is to forgive.