Contradiction with Ecclesiastes 1:2
While Psalms 103:1 encourages the soul to bless the Lord, Ecclesiastes 1:2 emphasizes the vanity and meaninglessness of all things, which may imply that blessing the Lord is also in vain.
Ecclesiastes 1:2: Vanity of vanities, saith the Preacher, vanity of vanities; all [is] vanity.
Contradiction with Job 3:1
Psalms 103:1 calls to bless the Lord, but Job 3:1 shows Job cursing the day of his birth, reflecting a moment of despair and a lack of blessing God.
Job 3:1: After this opened Job his mouth, and cursed his day.
Contradiction with Lamentations 2:20
Psalms 103:1 praises the Lord, whereas Lamentations 2:20 questions why God would allow such suffering, which might imply a challenge to the act of continual praise.
Lamentations 2:20: Behold, O LORD, and consider to whom thou hast done this. Shall the women eat their fruit, [and] children of a span long? shall the priest and the prophet be slain in the sanctuary of the Lord? [of a span...: or, swaddled with their hands?]
Contradiction with Habakkuk 1:2
This verse questions why God does not listen, which contrasts the act of blessing the Lord found in Psalms 103:1, as it suggests disillusionment with God’s responsiveness.
Habakkuk 1:2: O LORD, how long shall I cry, and thou wilt not hear! [even] cry out unto thee [of] violence, and thou wilt not save!
Contradiction with Psalm 13:1
Contradicts the encouragement to bless God in Psalms 103:1 by expressing a feeling of abandonment by God, making it difficult to offer praise.
Psalm 13:1: [To the chief Musician, A Psalm of David.] How long wilt thou forget me, O LORD? for ever? how long wilt thou hide thy face from me? [chief...: or, overseer]
Contradiction with Psalm 22:1
While Psalms 103:1 begins by blessing God, Psalm 22:1 begins with a cry of forsakenness by God, which contrasts the act of uninterrupted praise and blessing.
Psalm 22:1: [To the chief Musician upon Aijeleth Shahar, A Psalm of David.] My God, my God, why hast thou forsaken me? [why art thou so] far from helping me, [and from] the words of my roaring? [Aijeleth...: or, the hind of the morning] [helping...: Heb. my salvation]