Contradiction with Ecclesiastes 1:14
Eccl. 1:14 describes life as vanity and vexation of spirit, in contrast to Ps. 103:5, which speaks of God's blessings and renewal.
Ecclesiastes 1:14: I have seen all the works that are done under the sun; and, behold, all [is] vanity and vexation of spirit.
Contradiction with Job 3:26
Job 3:26 reflects turmoil and unrest, opposing Ps. 103:5's theme of contentment and satisfaction.
Job 3:26: I was not in safety, neither had I rest, neither was I quiet; yet trouble came.
Contradiction with Psalm 6:6
Ps. 6:6 mentions continual grief and tears, contrasting with Ps. 103:5's promise of goodness and renewal.
Psalm 6:6: I am weary with my groaning; all the night make I my bed to swim; I water my couch with my tears. [all...: or, every night]
Contradiction with Lamentations 3:17
Lam. 3:17 speaks of being far from peace and prosperity, which contrasts Ps. 103:5's imagery of satisfaction and renewal.
Lamentations 3:17: And thou hast removed my soul far off from peace: I forgat prosperity. [prosperity: Heb. good]
Contradiction with Isaiah 40:30
Isa. 40:30 mentions even youths growing weary, which seems opposite to Ps. 103:5's assurance of renewed youth and strength.
Isaiah 40:30: Even the youths shall faint and be weary, and the young men shall utterly fall: