Whenever necessity compels one to reprove or rebuke another, we ought to proceed with godly discernment and caution. First of all, let us consider whether the other fault is such as we ourselves have never had, or whether it is one that we have overcome. Then, if we have never had such a fault, let us remember that we are human and could have had it. But if we have had it and are rid of it now, let us remember our common frailty, in order that mercy, not hatred, may lead us to the giving of correction and admonition.
— Augustine