Open rebuke is better than secret love.
Proverbs 28:23
He that rebuketh a man afterwards shall find more favour than he that flattereth with the tongue.
Leviticus 19:17
Thou shalt not hate thy brother in thine heart: thou shalt in any wise rebuke thy neighbour, and not suffer sin upon him.
Matthew 18:15
Moreover if thy brother shall trespass against thee, go and tell him his fault between thee and him alone: if he shall hear thee, thou hast gained thy brother.
Galatians 2:14
But when I saw that they walked not uprightly according to the truth of the gospel, I said unto Peter before them all, If thou, being a Jew, livest after the manner of Gentiles, and not as do the Jews, why compellest thou the Gentiles to live as do the Jews?
1 Timothy 5:20
Them that sin rebuke before all, that others also may fear.