2 Corinthians 13:5
Test yourselves to discover whether you are true believers: put your own selves under examination. Or do you not know that Jesus Christ is within you, unless you are insincere?
Acts 26:20
but I proceeded to preach first to the people in Damascus, and then to those in Jerusalem and in all Judaea, and to the Gentiles, that they must repent and turn to God, and live lives consistent with such repentance.
1 Corinthians 11:28
But let a man examine himself, and, having done that, then let him eat the bread and drink from the cup.
1 Corinthians 11:31
If, however, we estimated ourselves aright, we should not be judged.