1 Thessalonians 5:21
Bring everything to the test; cling to what is good;
John 7:24
Do not judge by appearances; judge justly."
Romans 12:2
Do not conform to the fashion of this world; but be transformed by the complete change that has come over your minds, so that you may discern what God's will is--all that is good, acceptable, and perfect.
1 Corinthians 6:2-5
Do not you know that Christ's People will try the world? And if the world is to be tried by you, are you unfit to try the most trivial cases?
Galatians 2:11-14
But, when Peter came to Antioch, I opposed him to his face; for he stood self-condemned.