Open rebuke is better than hidden love.

Proverbs 28:23 He that rebuketh a man, shall afterward find favour with him, more than he that by a flattering tongue deceiveth him.

Leviticus 19:17 Thou shalt not hate thy brother in thy heart: But reprove him openly, lest thou incur sin through him.

Matthew 18:15 But if thy brother shall offend against thee, go, and rebuke him between thee and him alone. If he shall hear thee, thou shalt gain thy brother.

Galatians 2:14 But when I saw that they walked not uprightly unto the truth of the gospel, I said to Cephas before them all: If thou, being a Jew, livest after the manner of the Gentiles and not as the Jews do, how dost thou compel the Gentiles to live as do the Jews?

1 Timothy 5:20 Them that sin reprove before all that the rest also may have fear.