Not to return gratitude for benefits, my AEbutius Liberalis, is both base in itself, and is thought base by all men; wherefore even ungrateful men complain of ingratitude, and yet what all condemn is at the same time rooted in all; and so far do men sometimes run into the other extreme that some of them become our bitterest enemies, not merely after receiving benefits from us, but because they have received them. I cannot deny that some do this out of sheer badness of nature; but more do so because lapse of time destroys their remembrance, for time gradually effaces what they felt vividly at the moment. I remember having had an argument with you about this class of persons, whom you wished to call forgetful rather than ungrateful, as if that which caused a man to be ungrateful was any excuse for his being so, or as if the fact of this happening to a man prevented his being ungrateful, when we know that it only happens to ungrateful men. There are many classes of the ungrateful, as there are of thieves or of homicides, who all have the same fault, ............