Romans 14:23
But he who is in doubt is judged if he takes food, because he does it not in faith; and whatever is not of faith is sin.
Romans 13:2
For which reason everyone who puts himself against the authority puts himself against the order of God: and those who are against it will get punishment for themselves.
1 Corinthians 8:7
Still, all men have not that knowledge: but some, being used till now to the image, are conscious that they are taking food which has been offered to the image; and because they are not strong in the faith, their minds are troubled.
1 Corinthians 11:29-31
For a man puts himself in danger, if he takes part in the holy meal without being conscious that it is the Lord's body.
Romans 14:5
This man puts one day before another: to that man they are the same. Let every man be certain in his mind.
Titus 1:15
To the clean in heart all things are clean: but to those who are unclean and without faith nothing is clean; they become unclean in mind and in thought.
Hebrews 11:6
And without faith it is not possible to be well-pleasing to him, for it is necessary for anyone who comes to God to have the belief that God is, and that he is a rewarder of all those who make a serious search for him.