No one conceives himself to be indebted for a benefit to the Nile, any more than he would owe it a grudge if its waters flooded his fields to excess, and retired more slowly than usual; the wind does not bestow benefits, gentle and favorable though it may be, nor does wholesome and useful food; for he who would bestow a benefit upon me, must not only do me good, but must wish to do so. No obligation can therefore be incurred towards dumb animals; yet how many men have been saved from peril by the swiftness of a horse!⁠—nor yet towards trees⁠—yet how many sufferers from summer heat have been sheltered by the thick foliage of a tree! What difference can it make, whether I have profited by the act of one who did not know that he was doing me good, or one who could not know it, when in each case the will to do me good was wanting? You might as well bid me be grateful to a ship, a carriage, or a lance for saving me from danger, as bid me be grateful to a man who may have done me good by chance, but with no more intention of doing me good than those things could have.