The brain is the highest of the organs in position, and it is protected by the vault of the head; it has no flesh or blood or refuse. It is the citadel of sense-perception.
Accustom yourself to master and overcome things of difficulty; for if you observe, the left hand for want of practice is insignificant, and not adapted to general business; yet it holds the bridle better than the right, from constant use.
Indeed, what is there that does not appear marvelous when it comes to our knowledge for the first time? How many things, too, are looked up on as quite impossible until they have been actually effected?
The great business of man is to improve his mind, and govern his manners; all other projects and pursuits, whether in our power to compass or not, are only amusements.
