If one of you sees, sometime, something unedifying and so much as goes on to pass it on and put it into the heart of another brother, in doing so you not only harm yourself but you harm your brother by putting one more little bit of knavery into his heart. Even if that brother has his mind set on prayer or some other noble activity, and the first arrives and furnishes him with something to prate about, he not only impedes what he ought to be doing, but brings a temptation on him. There is nothing graver or more deadly than this doing harm, not only to himself but also to his neighbor.