Contradiction with Proverbs 3:5
This verse advises complete trust in the Lord rather than any reliance on one's own strength, in contrast to the implication of human capability in Psalms 20:8.
Proverbs 3:5: Trust in the LORD with all thine heart; and lean not unto thine own understanding.
Contradiction with Isaiah 40:31
This verse suggests strength comes from waiting on the Lord, rather than falling or being defeated as implied in Psalms 20:8's depiction of human strength faltering.
Isaiah 40:31: But they that wait upon the LORD shall renew [their] strength; they shall mount up with wings as eagles; they shall run, and not be weary; [and] they shall walk, and not faint. [renew: Heb. change]
Contradiction with Jeremiah 17:5
This verse warns against trusting in human strength, contrasting with the depiction of reliance on oneself in Psalms 20:8.
Jeremiah 17:5: Thus saith the LORD; Cursed [be] the man that trusteth in man, and maketh flesh his arm, and whose heart departeth from the LORD.