Thematic Bible: What preachers should do

Know ye not that those who are occupied upon sacred things eat of the things of the temple? and that those who wait at the altar partake with the altar? Even so did the Lord ordain, that those who proclaim the Gospel should live by the Gospel.

My little children, these things I write to you, that ye may not sin. And, if any one sin, we have an Advocate with the Father, Jesus Christ, the Righteous. And He is the propitiation for our sins; and not for ours only, but also for the whole world. And in this we know that we have known Him, if we keep His commandments. read more.
He who says, "I have known Him," and does not keep His commandments, is a liar, and the truth is not in him; but whosoever keeps His word, truly in him the love of God has been perfected: in this we know that we are in Him. He who says that he is abiding in Him ought himself also to walk even as He walked.