'Sacrificed' in the Bible

Purge out the old yeast, that you may be a new lump, even as you are unleavened. For indeed Christ, our Passover, has been sacrificed in our place.

Now concerning things sacrificed to idols: We know that we all have knowledge. Knowledge puffs up, but love builds up.

Therefore concerning the eating of things sacrificed to idols, we know that no idol is anything in the world, and that there is no other God but one.

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.

For if a man sees you who have knowledge sitting in an idol's temple, won't his conscience, if he is weak, be emboldened to eat things sacrificed to idols?

What am I saying then? That a thing sacrificed to idols is anything, or that an idol is anything?