1 Corinthians 8:9

But take heed. — On this very account, because the matter is one which is indifferent, because there is no right or wrong in it, you must look elsewhere for your guide as to how you ought to act. In things which are not indifferent, right or wrong is the sole test of action. In things indifferent you must look for some other guide, and you must regulate your conduct by the effect it may have on others. Your liberty, which arises from the bare fact of the indifferent nature of the thing, may become a stumbling-block to others, may be the cause of their taking a false step in the Christian course.