Sayings of Socrates 16

Either I do not corrupt them, or I corrupt them unintentionally, so that on either view of the case you lie. 

If my offense is unintentional, the law has no cognizance of unintentional offenses. You ought to have taken me privately, and warned and admonished me; for if I had been better advised, I should have left off doing what I only did unintentionally—no doubt I should.

Whereas you hated to converse with me or teach me, but you indicted me in this court, which is the place not of instruction, but of punishment.

—Plato, Apology 26a