Men of Athens, do not interrupt, but hear me; there was an agreement between us that you should hear me out. And I think that what I am going to say will do you good: for I have something more to say, at which you may be inclined to cry out; but I beg that you will not do this. I would have you know that, if you kill such a one as I am, you will injure yourselves more than you will injure me. Meletus and Anytus will not injure me: they cannot; for it is not in the nature of things that a bad man should injure a better than himself. I do not deny that he may, perhaps, kill him, or drive him into exile, or deprive him of civil rights; and he may imagine, and others may imagine, that he is doing him a great injury: but in that I do not agree with him; for the evil of doing as Anytus is doing - of unjustly taking away another man's life - is greater far. And now, Athenians, I am not going to argue for my own sake, as you may think, but for yours, that you may not sin against the God, or lightly reject his boon by condemning me. For if you kill me you will not easily find another like me, who, if I may use such a ludicrous figure of speech, am a sort of gadfly, given to the state by the God; and the state is like a great and noble steed who is tardy in his motions owing to his very size, and requires to be stirred into life. I am that gadfly which God has given the state and all day long and in all places am always fastening upon you, arousing and persuading and reproaching you. And as you will not easily find another like me, I would advise you to spare me. I dare say that you may feel irritated at being suddenly awakened when you are caught napping; and you may think that if you were to strike me dead, as Anytus advises, which you easily might, then you would sleep on for the remainder of your lives, unless God in his care of you gives you another gadfly. And that I am given to you by God is proved by this: - that if I had been like other men, I should not have neglected all my own concerns, or patiently seen the neglect of them during all these years, and have been doing yours, coming to you individually, like a father or elder brother, exhorting you to regard virtue; this I say, would not be like human nature. And had I gained anything, or if my exhortations had been paid, there would have been some sense in that: but now, as you will perceive, not even the impudence of my accusers dares to say that I have ever exacted or sought pay of anyone; they have no witness of that. And I have a witness of the truth of what I say; my poverty is a sufficient witness.
—Plato, The Apology of Socrates, p. -1