“A man,” it is argued, “who has received a benefit, however gratefully he may have received it, has not yet accomplished all his duty, for there remains the part of repayment; just as in playing at ball it is something to catch the ball cleverly and carefully, but a man is not called a good player unless he can handily and quickly send back the ball which he has caught.” This analogy is imperfect; and why? Because to do this creditably depends upon the movement and activity of the body, and not upon the mind: and an act of which we judge entirely by the eye, ought to be all clearly displayed. But if a man caught the ball as he ought to do, I should not call him a bad player for not returning it, if his delay in re............