David Hume, A Treatise of Human Nature, book 3 sect. 7. “You have the same propension, that I have, in favour of what is contiguous above what is remote. You are, therefore, naturally carried to commit acts of injustice as well as me. Your example both pushes me forward in this way by imitation, and also affords me a new reason for any break of equity, by shewing me, that I should be the cully of my integrity, if I alone shou’d impose on myself a severe restraint amidst the licentiousness of others.”
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cully, A fool or dupe.