Let us revert to the first type. Would you have me do something in order to show my gratitude? But he himself did nothing in order to give me a benefit! Passing to the second type, do you wish me to show gratitude to such a man — of my own will to return what I received from him against his will? And what shall I say of the third type, the man who stumbled into doing a benefit in trying to do an injury? To render me indebted to you for a benefit, it is not enough that you wished to give; but, to keep me from being indebted to you, it is enough that you did not wish to give. For a benefit is not accomplished by a mere wish; but, because the best and most copious wish would not be a benefit if good fortune had been lacking, just as truly good fortune is not a benefit unless the good wish has preceded the good fortune. For in order to place me under obligation to you, you must not merely have done me a service, but have done it intentionally.