Jesus tells us ..
Luk 17:3 "Be on your guard! If your brother sins, rebuke him; and if he repents, forgive him.
How can you say you love someone, if you let them go on sinning against God and do not even try to help them ???
Mat 7:1 "Do not judge so that you will not be judged.
Mat 7:2 "For in the way you judge, you will be judged; and by your standard of measure, it will be measured to you.
Most people read only verse 1 and not verse 2 .. this is WHY they think we are not to judge others .. also non-believers love to quote verse 1, so Christians do not tell them they are sinning .. John the Baptist and the Apostles made it quite clear to people WHAT sin is, and to Make Straight His Way ..
Verse 2 .. says: IN THE WAY YOU JUDGE ..
also verse 1 only applies to those who have not yet removed the beam from their own eye so they CAN remove the one from their brothers eye ..
Jhn 7:24 "Do not judge according to appearance, but judge with righteous judgment."
judging words and deeds righteously is done by using "God's will" which is in His word ..
once again people only read verse 4 and not verse 5 .. which tells us HOW ..
Mat 7:4 "Or how can you say to your brother, 'Let me take the speck out of your eye,' and behold, the log is in your own eye?
Mat 7:5 "You hypocrite, first take the log out of your own eye, and then you will see clearly to take the speck out of your brother's eye.
Again we see that we are told when we judge, we are not to be also guilty of that in which we judge ..
Pro 10:17 He is on the path of life who heeds instruction, But he who ignores reproof goes astray.
Pro 13:1 A wise son accepts his father's discipline, But a scoffer does not listen to rebuke.
Pro 15:31 He whose ear listens to the life-giving reproof Will dwell among the wise.
Ecc 7:5 It is better to listen to the rebuke of a wise man Than for one to listen to the song of fools.