A jackass has that kind of strength, and puts it to a useful purpose, and is valuable to the world because he is a jackass; but anobleman is not valuable because he is a jackass. It is a mixture that is always ineffectual, and should never have been attempted in the first place. And yet, once you start a mistake, the trouble is done and you never know what is going to come of it.
The higher animals get their teeth without pain or inconvenience. Man gets his through months and months of cruel torture; he will never get a set which can really be depended on 'till a dentist makes him one.