Nothing is at last sacred but the integrity of our own mind.

The more you use your brain, the more brain you will have to use.

Anguish of mind has driven thousands to suicide; anguish of body, none. This proves that the health of the mind is of far more consequence to our happiness, than the health of the body, although both are deserving of much more attention than either of them receive.

Whatever that be which thinks, understands, wills, and acts. it is something celestial and divine.

I find, by experience, that the mind and the body are more than married, for they are most intimately united; and when one suffers, the other sympathizes.

Nothing in life is as good as the marriage of true minds between man and woman. As good? It is life itself.

The power of accurate observation is commonly called cynicism by those who have not got it.

The failure of the mind in old age is often less the results of natural decay, than of disuse. Ambition has ceased to operate; contentment bring indolence, and indolence decay of mental power, ennui, and sometimes death. Men have been known to die, literally speaking, of disease induced by intellectual vacancy.

No mind, however loving, could bear to see plainly into all the recess of another mind.

Old minds are like old horses; you must exercise them if you wish to keep them in working order.