Contradiction with Ecclesiastes 9:5
Ecclesiastes 9:5 states that the dead know nothing, contradicting the hope and gratitude expressed in Psalms 42:11.
Ecclesiastes 9:5: For the living know that they shall die: but the dead know not any thing, neither have they any more a reward; for the memory of them is forgotten.
Contradiction with Matthew 6:34
Matthew 6:34 advises not to worry about tomorrow, potentially conflicting with the introspective and troubled tone of Psalms 42:11.
Matthew 6:34: Take therefore no thought for the morrow: for the morrow shall take thought for the things of itself. Sufficient unto the day [is] the evil thereof.
Contradiction with Job 3:26
Job 3:26 speaks of unending turmoil, which contrasts with the hope and trust in God depicted in Psalms 42:11.
Job 3:26: I was not in safety, neither had I rest, neither was I quiet; yet trouble came.
Contradiction with Lamentations 3:17
Lamentations 3:17 describes being far from peace, whereas Psalms 42:11 reflects emotional upliftment and consolation.
Lamentations 3:17: And thou hast removed my soul far off from peace: I forgat prosperity. [prosperity: Heb. good]
Contradiction with 1 Samuel 16:14
1 Samuel 16:14 notes the departure of the Spirit of the Lord, whereas Psalms 42:11 speaks of a personal hope in God.
1 Samuel 16:14: But the Spirit of the LORD departed from Saul, and an evil spirit from the LORD troubled him. [troubled: or, terrified]
Contradiction with Ecclesiastes 2:17
Ecclesiastes 2:17 expresses a hatred for life, which is at odds with the hopeful stance in Psalms 42:11.
Ecclesiastes 2:17: Therefore I hated life; because the work that is wrought under the sun [is] grievous unto me: for all [is] vanity and vexation of spirit.