Ambrose of Milan

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That there might neither be hard-wrung pardon, nor a too easy forgiveness, neither a harsh upbraiding, to dishearten, nor an overlooking of faults, to invite to sin; therefore it is said in another place, Tell him his fault between him and thee alone. (Mat. 18:15.) For better is a friendly correction, than a quarrelsome accusation. The one strikes shame into a man, the other moves his indignation. He who is admonished will more likely be saved, because he fears to be destroyed. For it is well that he who is corrected should believe you to be rather his friend than his enemy. For we more readily give ear to counsel than yield to injury. Fear is a weak preserver of consistency, but shame is an excellent master of duty. For he who fears is restrained, not amended. But He has well said, If he trespass against thee. For it is not the same thing to sin against God and to sin against man.