1 Corinthians 8:6-7

yet for us there is but one God, the Father, who is the source of all things, and we exist for Him; and one Lord, Jesus Christ, by whom are all things [that have been created], and we [believers exist and have life and have been redeemed] through Him. [Mal 2:10] However, not all [believers] have this knowledge. But some, being accustomed [throughout their lives] to [thinking of] the idol until now [as real and living], still eat food as if it were sacrificed to an idol; and because their conscience is weak, it is defiled (guilty, ashamed).