Contradiction with Romans 3:20
This verse suggests that the law is primarily for the knowledge of sin, implying it cannot impart righteousness, which can seem to contrast with the idea in Galatians that the law might have been given for a different purpose.
Romans 3:20: Therefore by the deeds of the law there shall no flesh be justified in his sight: for by the law [is] the knowledge of sin.
Contradiction with Romans 7:7
Indicates the law's role in defining sin, raising questions about its purpose and beneficial use which can seem to challenge a more negative view of the law's role.
Romans 7:7: What shall we say then? [Is] the law sin? God forbid. Nay, I had not known sin, but by the law: for I had not known lust, except the law had said, Thou shalt not covet. [lust: or, concupiscence]
Contradiction with James 1:25
Refers to the law as a "perfect law of liberty", which can be viewed as contrasting with any notion that the law is opposed to God's grace or purpose.
James 1:25: But whoso looketh into the perfect law of liberty, and continueth [therein], he being not a forgetful hearer, but a doer of the work, this man shall be blessed in his deed. [deed: or, doing]
Paradox #1
Galatians 3:21 might seem to suggest a contradiction because it questions whether the law is opposed to God's promises. Some might see a conflict in how the law and faith interact. The confusion arises because the law given to Moses is seen as important, yet here, Paul emphasizes that keeping the law is not what leads to life; rather, faith in Jesus does. The potential inconsistency is in understanding how the law, which is good and given by God, fits with the idea of salvation through faith alone.