Contradiction with Jeremiah 17:5
This verse emphasizes the futility and curse of trusting in man over God, contrasting the complete trust in God mentioned in Isaiah 12:2.
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.
Contradiction with Psalm 146:3
Advises against trusting in princes or human beings for they cannot save, while Isaiah 12:2 reflects salvation and trust in God alone.
Psalm 146:3: Put not your trust in princes, [nor] in the son of man, in whom [there is] no help. [help: or, salvation]
Contradiction with Proverbs 28:26
Warns that those who trust in their own hearts are fools, whereas Isaiah 12:2 speaks of trust and confidence in God for strength and salvation.
Proverbs 28:26: He that trusteth in his own heart is a fool: but whoso walketh wisely, he shall be delivered.