Contradiction with Matthew 6:34
Luke 12:26 implies not worrying about life's necessities by trusting God, while Matthew 6:34 suggests not worrying about the future by emphasizing that each day has its own concerns.
Matthew 6:34: Take therefore no thought for the morrow: for the morrow shall take thought for the things of itself. Sufficient unto the day [is] the evil thereof.
Contradiction with Philippians 4:6
Luke 12:26 suggests not to worry since it can't add value, whereas Philippians 4:6 advises to not be anxious about anything but use prayer and supplication for needs.
Philippians 4:6: Be careful for nothing; but in every thing by prayer and supplication with thanksgiving let your requests be made known unto God.
Contradiction with Proverbs 12:25
Luke 12:26 argues against worry's utility, but Proverbs 12:25 acknowledges that anxiety can weigh a heart down and hints at addressing it rather than dismissing it.
Proverbs 12:25: Heaviness in the heart of man maketh it stoop: but a good word maketh it glad.
Contradiction with 1 Peter 5:7
Luke 12:26 implies worry is futile, whereas 1 Peter 5:7 suggests actively casting anxieties on God, recognizing their presence.
1 Peter 5:7: Casting all your care upon him; for he careth for you.
Contradiction with Romans 8:31
Luke 12:26 questions the utility of worry given God's providence, while Romans 8:31 proposes assurance in God's favor as a preventative for worry.
Romans 8:31: What shall we then say to these things? If God [be] for us, who [can be] against us?
Contradiction with Isaiah 41:10
Luke 12:26 implies the futility of worry, but Isaiah 41:10 assures with divine support to counteract worry.
Isaiah 41:10: Fear thou not; for I [am] with thee: be not dismayed; for I [am] thy God: I will strengthen thee; yea, I will help thee; yea, I will uphold thee with the right hand of my righteousness.