Romans 14:5
One doth judge one day above another, and another doth judge every day alike; let each in his own mind be fully assured.
Romans 14:23
and he who is making a difference, if he may eat, hath been condemned, because it is not of faith; and all that is not of faith is sin.
Romans 14:14
I have known, and am persuaded, in the Lord Jesus, that nothing is unclean of itself, except to him who is reckoning anything to be unclean -- to that one it is unclean;
1 Corinthians 8:7
but not in all men is the knowledge, and certain with conscience of the idol, till now, as a thing sacrificed to an idol do eat it, and their conscience, being weak, is defiled.
1 Corinthians 8:11
and the brother who is infirm shall perish by thy knowledge, because of whom Christ died?
Galatians 4:9-10
and now, having known God -- and rather being known by God -- how turn ye again unto the weak and poor elements to which anew ye desire to be in servitude?
Colossians 2:16-17
Let no one, then, judge you in eating or in drinking, or in respect of a feast, or of a new moon, or of sabbaths,
1 John 3:19-21
and in this we know that of the truth we are, and before Him we shall assure our hearts,