1 Corinthians 10:19 Meaning

17For we being many are one bread, and one body: for we are all partakers of that one bread.

18Behold Israel after the flesh: are not they which eat of the sacrifices partakers of the altar?

19What say I then? that the idol is any thing, or that which is offered in sacrifice to idols is any thing?

20But I say, that the things which the Gentiles sacrifice, they sacrifice to devils, and not to God: and I would not that ye should have fellowship with devils.

21Ye cannot drink the cup of the Lord, and the cup of devils: ye cannot be partakers of the Lord's table, and of the table of devils.