The artist in the moral world must be very careful not to suffer his nice sense of retributive justice, to get so much the better of his judgment, as an artist, as to make him forgetful of human probabilities, and the superior duty of preparing the mind of the young reader by sterling examples of patience and protracted reward, to bear up manfully against injustice, and not to despond because his rewards are slow. It would be very easy for an author to make everybody good, or, if any were bad, to dismiss them, out of hand, to purgatory and places even worse. But it would be a thankless toil to read the writings of such an author. His characters would fail in vraisemblance, and his incidents would lack in interest. The world is a sort of vast moral lazar-house, in which most have sores, either of greater or less degree of virulence. Some are nurses, and doctors, and guardians; and these are necessarily free from the diseases to which they minister. Some, though not many, are entirely incurable; many labor for years in pain, and when dismissed, still hobble along feebly, bearing the proofs of their trials in ugly seams and blotches, contracted limbs, and pale, haggard features. Others get off with a shorter and less severe probation. None are free from taint, and those who are the most free, are not always the greatest favorites with fortune. We are speaking of the moral world, good reader. We simply borrow an illustration from the physical. Our interest in one another is very much derived from our knowledge of each other's infirmities; and it may be remarked, passingly, that this interest is productive of very excellent philosophical temper, since it enables us to bear the worst misfortunes of our best friends with the most amazing fortitude. It is a frequent error with the reader of a book--losing sight of these facts--to expect that justice will always be done on the instant. He will suffer no delay in the book, though he sees that this delay of justice is one of the most decided of all the moral certainties whether in life or law. He does not wish to see the person in whom the author makes him interested, perish in youth--die of broken heart or more rapid disaster; and if he could be permitted to interfere, the bullet or the knife of the assassin would be arrested at the proper moment and always turned against the bosom of the wrong-doer.