TSK · Romans 14:5

I know, and am persuaded in the Lord Jesus, that nothing is unclean of itself; except that to him who considers anything to be unclean, to him it is unclean.

However, that knowledge isn't in all men. But some, with consciousness of the idol until now, eat as of a thing sacrificed to an idol, and their conscience, being weak, is defiled.

But now that you have come to know God, or rather to be known by God, why do you turn back again to the weak and miserable elemental principles, to which you desire to be in bondage all over again?

And by this we know that we are of the truth, and persuade our hearts before him,