If we as Christians are not doing the same sin that the person we are rebuking is doing, we are not judging but he/she are obeying God’s Word in 1 Corinthians 5:12 it says, “For what business is it of mine to judge outsiders? Don’t you judge those who are inside?”
Now, we can’t be hypocrites and bring to someone’s attention a particular sin that they are doing especially if we are guilty of doing the same thing or living as the world. If a Christian is right with God, then he/she has the right to tell another believer that they are headed in the wrong direction as in Galatians 2:11-13 which says, “11 But when Cephas came to Antioch, I opposed him to his face because he stood condemned. 12 For he regularly ate with the Gentiles before certain men came from James. However, when they came, he withdrew and separated himself, because he feared those from the circumcision party. 13 Then the rest of the Jews joined his hypocrisy, so that even Barnabas was carried away by their hypocrisy.”
Remember that God uses believers to point out in another believer’s life through scripture when he is shifting out of God’s will. I had that happen to me years back when a brother in Christ called me one day and said that he didn’t agree in an area of my life where I was living a life contrary to God’s will and guess what? I took it like it was God speaking to me through my friend and I changed because I knew that what he pointed out was the truth.
The question is not if he is judging you but is he speaking the truth in what he is pointing out? We need to be humble and accept a rebuke IF it’s true and if it isn’t, then make sure to tell that person that he/she has misunderstood you. Pride REFUSES to allow correction in a person’s life. Who likes being corrected? I know I don’t but if we have a different viewpoint as if it’s God rebuking you, it will make a big difference. Satan’s pride made him fall and Jesus’ humility made Him exalted.