Assiduity of obligation strikes upon the conscience as well as the memory, and pursues an ungrateful man till he becomes grateful: if one good office will not do it, try a second, and then a third. No man can be so thankless, but either shame, occasion, or example, will, at some time or other, prevail upon him. The very beasts themselves, even lions and tigers, are gained by good usage: beside, that one obligation does naturally draw on another; and a man would not willingly leave his own work imperfect. “I have helped him thus far, and I will even go through with it now.” So that, over and above the delight and the virtue of obliging, one good turn is a shouting-horn to another. This, of all hints, is perhaps the most effectual, as well as the most generous.