8 Now concerning things sacrificed to idols, we know that we all have knowledge. Knowledge [a]makes arrogant, but love edifies. 2 If anyone supposes that he knows anything, he has not yet known as he ought to know; 3 but if anyone loves God, he is known by Him. 4 Therefore concerning the eating of things sacrificed to idols, we know that [b]there is no such thing as an idol in the world, and that there is no God but one. 5 For even if there are so-called gods whether in heaven or on earth, as indeed there are many gods and many lords, 6 yet for us there is but one God, the Father, from whom are all things and we exist for Him; and one Lord, Jesus Christ, by whom are all things, and we exist through Him.—1 Cor. 8:1-6 NASB
We all possess knowledge, some less, some more. Knowledge can be defined as facts, information, skills or awareness of a situation. Knowledge is neither good nor evil in and of itself. We determine whether it is good or evil by the way we use it. It can be evil if we allow our knowledge to cause us to be prideful. We can have an abundance of knowledge and yet be misled because we have not asked for wisdom to apply that knowledge to our daily lives. In this case, knowledge of the law said they should not eat meat that had been sacrificed to idols. We know there is only one true God, so sacrificing to idols is sacrificing to “nothing”. Use your liberty in Christ Jesus to eat or not eat the meat unless the eating of the meat causes a brother or sister to be offended. If you can eat it with a clear conscience and give God the glory because all things come from Him and through Him we live, then eat.
21 It is good not to eat meat or to drink wine, or to do anything by which your brother stumbles. 22 The faith which you have, have as your own conviction before God. Happy is he who does not condemn himself in what he approves. 23 But he who doubts is condemned if he eats, because his eating is not from faith; and whatever is not from faith is sin.—Romans 14:23 NIV