1 Timothy 3:9
holding the mystery of the faith with a clear conscience,
1 Timothy 1:19
having faith and a good conscience, which some, [because they] have rejected [these], have suffered shipwreck concerning their faith,
1 Timothy 1:5
But the goal of our instruction is love from a pure heart and a good conscience and a faith without hypocrisy,
1 Timothy 3:16
And most certainly, great is the mystery of godliness: Who was revealed in the flesh, was vindicated by the Spirit, was seen by angels, was proclaimed among the Gentiles, was believed on in the world, was taken up in glory.
2 John 1:9-10
Everyone who goes too far and does not remain in the teaching of Christ does not have God. The one who remains in the teaching--this person has both the Father and the Son.