Mental pleasures never cloy; unlike those of the body, they are increased by reputation, approved by reflection, and strengthened by enjoyment.

Those who have resources within themselves, who can dare to live alone, want friends the least, but, at the same time, best know how to prize them the most. But no company is far preferable to bad, because we are more apt to catch the vices of others than their virtues, as disease is far more contagious than health.

If once a woman breaks through the barriers of decency, her ease is desperate; and if she goes greater lengths than the men, and leaves the pale of propriety farther behind her, it is because she is aware that all return is prohibited, and by none so strongly as by her own sex.

Logic and metaphysics make use of more tools than all the rest of the sciences put together, and do the least work.

In cases of doubtful morality, it is usual to say is there any harm in doing this? This question may sometimes be best answered by asking ourselves another; is there any harm in letting it alone?

Slight sorrow for sin is sufficient, provided it at the same time produces amendment.

He that studies only men will get the body of knowledge without the soul; and he that studies only books, the soul without the body.