Contradiction with Galatians 1:11-12
Paul asserts that he received the gospel by revelation from Jesus Christ, not through an experience like in Acts 22:6.
Galatians 1:11-12: But I certify you, brethren, that the gospel which was preached of me is not after man.
Contradiction with Acts 26:13
The account of the light and voice from heaven occurs at a different time of day compared to Acts 22:6.
Acts 26:13: At midday, O king, I saw in the way a light from heaven, above the brightness of the sun, shining round about me and them which journeyed with me.
Contradiction with Acts 9:3-4
The account of the light and voice from heaven differs slightly in details and context from Acts 22:6.
Acts 9:3-4: And as he journeyed, he came near Damascus: and suddenly there shined round about him a light from heaven:
Contradiction with Mark 1:15
Jesus calls for repentance and belief in his message, differing from the miraculous encounter in Acts 22:6.
Mark 1:15: And saying, The time is fulfilled, and the kingdom of God is at hand: repent ye, and believe the gospel.
Contradiction with John 1:18
States no one has seen God, yet Acts 22:6 describes a supernatural encounter with divine light.
John 1:18: No man hath seen God at any time; the only begotten Son, which is in the bosom of the Father, he hath declared [him].