1 Timothy 1:5

1:5 But the aim of our instruction is love that comes from a pure heart, a good conscience, and a sincere faith.

1 Timothy 1:19-20

1:19 To do this you must hold firmly to faith and a good conscience, which some have rejected and so have suffered shipwreck in regard to the faith. 1:20 Among these are Hymenaeus and Alexander, whom I handed over to Satan to be taught not to blaspheme.