One of the Christian’s greatest deterrents from sin is the life of another Christian. Some Christians maintain that it is none of their business if another chooses to sin. They are convinced that they are being judgmental if they respond to someone in sin. The world persuades them not to get involved, but this inaction prevents them from being an effective intercessor.
As Christians we are aware that sin brings death (Rom. 6:23). Sin kills relationships, dismantles marriages, stifles joy, and destroys peace. When we see someone wander from the truth into error, how should we respond? When Jesus saw sin it broke His heart. He wept over entire cities as He saw them rejecting the truth (Matt. 23:37-39). He prayed fervently for His disciples to be strong when they were tempted (John 17). He warned those who were heading toward spiritual failure (Matt. 26:20-25, 34). Jesus was even willing to die to save people from their sins because He knew the devastation that sin causes. Jesus never stood idle as those around Him were led astray by their sin. He always took an active role in turning them back to God.
“Minding your own business” will save you some discomfort, but it will not help a brother or sister who needs to return to the Lord. If you are truly aware of the grave consequences for those who continue in sin, you will be moved to weep even as Jesus wept. Pray fervently for your friend. That will safeguard your motives and prepare you to minister to him. Be alert, in the event that God asks you to confront your friend. If you do so, be loving and gentle lest you, too, be tempted (Gal. 6:1).