Concerning the Ten Commandments, which are the Heads of the Law (137-139)

Let every one then learn from his earliest infancy, never privily to steal anything that belongs to any one else, not even though it may be the merest trifle, because the habit, when it becomes inveterate, is more powerful than nature; and small things, if they are not checked, increase and grow, becoming gradually greater and greater till they reach a formidable magnitude.

And after he has forbidden stealing he proceeds in regular order to prohibit bearing false witness, knowing that those who bear false witness are liable to many great accusations, and in short to every kind of terrible charge;

and in the second place, in addition to speaking falsely, they also as it were envelop facts in night and dense darkness, and they co-operate with those who offend, and they join in attacking those who are injured by others, affirming that they positively know and have completely comprehended what they in reality have not seen nor heard, and of which they know nothing.