Contradiction with James 5:13
While Isaiah 38:20 speaks of singing praise due to God’s deliverance, James 5:13 suggests that those who are afflicted should pray rather than sing.
James 5:13: Is any among you afflicted? let him pray. Is any merry? let him sing psalms.
Contradiction with Ecclesiastes 3:4
Isaiah 38:20 mentions singing to the Lord regardless of circumstances, but Ecclesiastes 3:4 states there is a time to weep and a time to laugh, implying there are appropriate times for different actions.
Ecclesiastes 3:4: A time to weep, and a time to laugh; a time to mourn, and a time to dance;
Contradiction with Psalm 6:5
In contrast to Isaiah 38:20, which emphasizes praising God, Psalm 6:5 argues that in death, there is no remembrance of God, implying that praising God is not possible after death.
Psalm 6:5: For in death [there is] no remembrance of thee: in the grave who shall give thee thanks?
Contradiction with Job 3:1
While Isaiah 38:20 expresses gratitude and praise, Job 3:1 describes Job cursing the day of his birth, highlighting despair and lament instead of praise.
Job 3:1: After this opened Job his mouth, and cursed his day.
Contradiction with Lamentations 3:41–42
Isaiah 38:20 describes confidence in deliverance and praise, whereas Lamentations speaks about lifting hearts and hands in sorrowful acknowledgment of transgression and not deliverance.