Contradiction with Proverbs 21:30
This verse states, "There is no wisdom nor understanding nor counsel against the LORD," which seems to contradict the notion of Joshua exercising his own command independently, as described in Joshua 4:17.
Proverbs 21:30: [There is] no wisdom nor understanding nor counsel against the LORD.
Contradiction with Romans 13:1
This verse suggests that all authority comes from God, which may appear contradictory to Joshua 4:17 where Joshua gives his own command to the priests.
Romans 13:1: Let every soul be subject unto the higher powers. For there is no power but of God: the powers that be are ordained of God. [ordained: or, ordered]