By command, by counsel, by consent, by flattery, by receiving, by participation, by silence, by not preventing, by not denouncing [(iussio, consilium, consensus, palpo, recursus, participans, mutus, non obstans, non manifestans)].
"In the other cases mentioned above, a man is not always bound to restitution: because counsel and flattery are not always the efficacious cause of robbery. Hence the counsellor or flatterer is bound to restitution, only when it may be judged with probability that the unjust taking resulted from such causes."
Thomas Aquinas, Summa theologiae II-II.62.7.Resp., trans. FEDP (Shapcote). Latin from Corpus Thomisticum. Also Super Sent., lib. 4 d. 15 q. 1 a. 5 qc. 3 co.
I was put onto this by Kevin L. Flannery (First things no. 254 (June/July 2015): 55 (54-55), who, however, may (?) conflate "the failings of pastors and professors" with the failings of those truly "bound" to confront or prevent, e.g. "persons in authority who are bound to safeguard justice on earth".
Flannery says that the origin of the quotation has not been identified. Can I track it down?