1 Corinthians 8:1-6
1 “Now concerning food sacrificed to idols, we know that we all have knowledge. Knowledge makes one conceited, but love edifies people. 2 If anyone thinks 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 food sacrificed to idols, we know that an idol is nothing at all 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 only 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.”
No God but one: According to Paul eating food sacrificed to idols was not a big problem. Christians know that there is no other God but the true God so there are no real idols because there are no other gods. Therefore, Christians have freedom to eat from such types of food because there is no real attachment to gods.
By whom are all things: Paul is emphasizing that Jesus is the creator of the world and the author of life Himself. Because Christians are in Jesus, they know the true God and consequently have freedom in how they interact with debatable issues such as food sacrificed to idols. Therefore, there is no comparison to demons who are associated with certain idols.