Treasury of Scripture Knowledge
Unto the pure all things are pure: but unto them that are defiled and unbelieving is nothing pure; but even their mind and conscience is defiled.
And the Lord said to him, "Now you Pharisees [meticulously] clean the outside of the cup and the dish [i.e., this was an allusion to their lives], but you are filled with greed for wealth and [other] evils on the inside.
So, the voice spoke again, saying, "What God has made [ceremonially] acceptable, you must not consider ordinary [and therefore defiled]."
As one who is in [fellowship with] the Lord Jesus, I am fully convinced that nothing in itself is [ceremonially] unclean. But to the person who considers something [ceremonially] unclean, it then becomes unclean to him.
1 Corinthians 6:12
"Everything is permissible for me [to do];" but not everything is profitable. [Note: The words in quote marks in this and the following verse are thought to have been commonly held views of that day, to which Paul gives an inspired reply]. "Everything is permissible for me [to do];" but I will not be ruled by anything.
1 Corinthians 10:23
"Everything is permissible [to do];" but not everything is profitable [See note at 6:12]. "Everything is permissible [to do];" but not everything builds [people] up.
1 Timothy 4:3
They forbid people to get married and require them to avoid [eating] certain foods, which God created to be received with thanksgiving by those who believe and [fully] know the truth.
1 Corinthians 8:7
However, not every person knows this [truth]. For some people have been so used to an idol all this time that they still think of the idol [as a reality] when eating food that has been sacrificed to it. And their weak conscience becomes polluted. [Note: These people cannot seem to shake off the idea that somehow the idol is real, so feel guilty of wrongdoing when eating food sacrificed to it].
how much more will the blood of Christ, who through the eternal Holy Spirit [or, His eternal Spirit] offered Himself without [moral] blemish to God, cleanse our consciences from deeds which lead to [spiritual] death to serve the living God?
we should draw close [to God] with a sincere heart and a fully assured faith, having had our hearts sprinkled from a guilty conscience [See 9:13-14] and having had our bodies washed with clean water [i.e., in our immersion].
So, for this reason I make every effort to have a clear conscience before God and men at all times.