Romans 14:5
One man esteems day more than day; another esteems every day alike. Let each be fully persuaded in his own mind.
Romans 14:23
But he that doubts, if he eat, is condemned; because it is not of faith; but whatever is not of faith is sin.
Romans 14:14
I know, and am persuaded in the Lord Jesus, that nothing is unclean of itself; except to him who reckons anything to be unclean, to that man it is unclean.
1 Corinthians 8:7
But knowledge is not in all: but some, with conscience of the idol, until now eat as of a thing sacrificed to idols; and their conscience, being weak, is defiled.
1 Corinthians 8:11
and the weak one, the brother for whose sake Christ died, will perish through thy knowledge.
Galatians 4:9-10
but now, knowing God, but rather being known by God, how do ye turn again to the weak and beggarly principles to which ye desire to be again anew in bondage?
Colossians 2:16-17
Let none therefore judge you in meat or in drink, or in matter of feast, or new moon, or sabbaths,
1 John 3:19-21
And hereby we shall know that we are of the truth, and shall persuade our hearts before him --