Contradiction with Psalm 51:1
This verse asks for God's mercy and forgiveness, in contrast to Job 7:21 where Job questions why God does not pardon his transgression.
Psalm 51:1: [To the chief Musician, A Psalm of David, when Nathan the prophet came unto him, after he had gone in to Bathsheba.] Have mercy upon me, O God, according to thy lovingkindness: according unto the multitude of thy tender mercies blot out my transgressions.
Contradiction with 1 John 1:9
This verse assures that if we confess our sins, God is faithful to forgive, contradicting Job 7:21 which implies the absence of forgiveness.
1 John 1:9: If we confess our sins, he is faithful and just to forgive us [our] sins, and to cleanse us from all unrighteousness.
Contradiction with Isaiah 43:25
God promises to blot out transgressions and not remember sins, contradicting Job's sense of remaining under sin's burden in Job 7:21.
Isaiah 43:25: I, [even] I, [am] he that blotteth out thy transgressions for mine own sake, and will not remember thy sins.
Contradiction with Luke 23:34
Jesus asks for forgiveness for those who crucified him, indicating divine forgiveness that contrasts with Job's complaint in Job 7:21.
Luke 23:34: Then said Jesus, Father, forgive them; for they know not what they do. And they parted his raiment, and cast lots.
Contradiction with Jeremiah 31:34
God declares that He will forgive iniquity and remember sins no more, contradicting Job's expression of despair over sin and its consequences in Job 7:21.
Jeremiah 31:34: And they shall teach no more every man his neighbour, and every man his brother, saying, Know the LORD: for they shall all know me, from the least of them unto the greatest of them, saith the LORD: for I will forgive their iniquity, and I will remember their sin no more.
Paradox #1
The contradiction in Job 7:21 could be seen in the context of forgiveness and punishment. Job is questioning why God does not forgive his sins if he is soon going to die anyway. This raises a conflict where a loving and forgiving God is seemingly not offering forgiveness to someone in deep suffering, which may seem inconsistent with the idea of a merciful deity.