Otherwise; Christ would have us careful not only of our own sin, but likewise that even they who pertain to us should keep themselves from evil. Have you any friend who looks to your matters as your own eye, or manages them as your own hand, if you know of any scandalous or base action that he has done, cast him from you, he is an offence; for we shall give account not only of our own sins, but also of such of those of our neighbours as it is in our power to hinder.
Reproduced in full. Translation: Oxford 1841 (Newman), public domain (Public domain).