We should rebuke in love –
not eagerly hoping to injure the person, but earnestly taking care to improve him.
If we have such a mindset, we practice what Christ commanded,
“If your brother sins against you, go and tell him his fault between you and him alone”
(Mt 18:15).
Why do you rebuke such people? Because you are grieved that they sinned against you?
God forbid.
If you do it out of love for yourself, you do not do anything.
If you do it out of love for the other person, you act in excellence.
Notice what these words say about whom you should love in doing so (yourself or the other person) :
“If he hears you, you have gained your brother”
(Mt 18:15).
Do it for other peoples’ sake then, so that you can “gain” them.
If by doing so you “gain” them, they would also be lost if you had not done it…
Therefore, do not let anyone disregard it when he sins against a fellow Christian.
For the Apostle Paul says,
“But when you thus sin against the brethren, and wound their weak conscience, you sin against Christ”
(1 Cor 8:12),
because we have been all made members of Christ.
How can you not sin against Christ if you sin against a member of Christ?
St. Augustine