Contradiction with Ecclesiastes 1:4
Psalms 103:15 speaks of human life as fleeting like grass, while Ecclesiastes 1:4 suggests the earth abides forever, contrasting the permanence of the earth with the transience of human life.
Ecclesiastes 1:4: [One] generation passeth away, and [another] generation cometh: but the earth abideth for ever.
Contradiction with Ecclesiastes 12:13
Psalms 103:15 focuses on the fleeting nature of life, whereas Ecclesiastes 12:13 emphasizes the enduring importance of fearing God and keeping His commandments as the whole duty of man, suggesting a lasting purpose.
Ecclesiastes 12:13: Let us hear the conclusion of the whole matter: Fear God, and keep his commandments: for this [is] the whole [duty] of man. [Let...: or, The end of the matter, even all that hath been heard, is]
Contradiction with Isaiah 40:8
Psalms 103:15 highlights the transience of human life, like grass, in contrast, Isaiah 40:8 states that the Word of God stands forever, introducing a sense of permanence.
Isaiah 40:8: The grass withereth, the flower fadeth: but the word of our God shall stand for ever.
Contradiction with James 4:14
Psalms 103:15 describes life as fleeting like grass, while James 4:14 describes life as a vapor that vanishes away, both highlight transience but use different metaphors.
James 4:14: Whereas ye know not what [shall be] on the morrow. For what [is] your life? It is even a vapour, that appeareth for a little time, and then vanisheth away. [It...: or, For it is]