Contradiction with Proverbs 3:5
While Acts 15:40 shows Paul trusting in the choice of Silas by the brethren, Proverbs 3:5 instructs to trust in the Lord rather than relying on human selection.
Proverbs 3:5: Trust in the LORD with all thine heart; and lean not unto thine own understanding.
Contradiction with Romans 12:19
Acts 15:40 depicts Paul choosing Silas after a disagreement, whereas Romans 12:19 advises against seeking personal retribution.
Romans 12:19: Dearly beloved, avenge not yourselves, but [rather] give place unto wrath: for it is written, Vengeance [is] mine; I will repay, saith the Lord.
Contradiction with Matthew 18:15
Acts 15:40 results from a disagreement that led to parting ways; Matthew 18:15 suggests resolving disputes privately and seeking reconciliation.
Matthew 18:15: Moreover if thy brother shall trespass against thee, go and tell him his fault between thee and him alone: if he shall hear thee, thou hast gained thy brother.
Contradiction with 1 Corinthians 1:10
Acts 15:40 illustrates division between Paul and Barnabas; 1 Corinthians 1:10 encourages believers to avoid divisions and be united in thought.
1 Corinthians 1:10: Now I beseech you, brethren, by the name of our Lord Jesus Christ, that ye all speak the same thing, and [that] there be no divisions among you; but [that] ye be perfectly joined together in the same mind and in the same judgment. [divisions: Gr. schisms]