Contradiction with Matthew 10:16
This verse suggests being both wise and harmless, whereas Luke 10:3 highlights vulnerability without mentioning wisdom.
Matthew 10:16: Behold, I send you forth as sheep in the midst of wolves: be ye therefore wise as serpents, and harmless as doves. [harmless: or, simple]
Contradiction with Psalm 23:4
This verse speaks of fearlessness because of God's presence, while Luke 10:3 highlights the danger and vulnerability of the mission.
Psalm 23:4: Yea, though I walk through the valley of the shadow of death, I will fear no evil: for thou [art] with me; thy rod and thy staff they comfort me.
Contradiction with Isaiah 41:10
This verse assures protection and strength from God, which contrasts with the imagery of vulnerability in Luke 10:3.
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.