When then we are brought under the necessity of finding fault with any, let us first consider whether the sin be such as we have never had; secondly that we are yet men, and may fall into it; then, whether it be one that we have had, and are now without, and then let our common frailty come into our mind, that pity and not hate may go before correction. Should we find ourselves in the same fault, let us not reprove, but groan with the offender, and invite him to struggle with us. Seldom indeed and in cases of great necessity is reproof to be employed; and then only that the Lord may be served and not ourselves.
Reproduced in full. Translation: Oxford 1841 (Newman), public domain (Public domain).
Also cites: Serm. in Mont., ii, 19