It is a pity there should exist so general a confusion of thought upon this subject, for it may be asserted without fear of contradiction that there is hardly any form of immorality now rife which produces more disastrous effects upon those who give themselves up to it, and upon society in general, than the so-called science of those who know that they know too well to be able to know truly. With very clever people--the people who know that they know--it is much as with the members of the early Corinthian Church, to whom St. Paul wrote, that if they looked their numbers over, they would not find many wise, nor powerful, nor well- born people among them. Dog-fanciers tell us that performing dogs never carry their tails; such dogs have eaten of the tree of knowledge, and are convinced of sin accordingly--they know that they know things, in respect of which, therefore, they are no longer under grace, but under the law, and they have yet so much grace left as to be ashamed. So with the human clever dog; he may speak with the tongues of men and angels, but so long as he knows that he knows, his tail will droop. More especially does this hold in the case of those who are born to wealth and of old family. We must all feel that a rich young nobleman with a taste for science and principles is rarely a pleasant object. We do not understand the rich young man in the Bible who wanted to inherit eternal life, unless, indeed, he merely wanted to know whether there was not some way by which he could avoid dying, and even so he is hardly worth considering. Principles are like logic, which never yet made a good reasoner of a bad one, but might still be occasionally useful if they did not invariably contradict each other whenever there is any temptation to appeal to them. They are like fire, good servants but bad masters. As many people or more have been wrecked on principle as from want of principle. They are, as their name implies, of an elementary character, suitable for beginners only, and he who has so little mastered them as to have occasion to refer to them consciously, is out of place in the society of well-educated people. The truly scientific invariably hate him, and, for the most part, the more profoundly in proportion to the unconsciousness with which they do so.