Morality in sexual relations, when it is free from superstition, consists essentially in respect for the other person, and unwillingness to use that person solely as a means of personal gratification, without regard to his or her desires.

One of the troubles about vanity is that it grows with what it feeds on. The more you are talked about, the more you will wish to be talked about.

Italy, and the spring and first love all together should suffice to make the gloomiest person happy.

If an opinion contrary to your own makes you angry, that is a sign that you are subconsciously aware of having no good reason for thinking as you do.

Americans need rest, but do not know it.

The power of thought, the vast regions it can master.

Nine-tenths of the appeal of pornography is due to the indecent feelings concerning sex which moralists inculcate in the young; the other tenth is physiological, and will occur in one way or another whatever the state of the law may be.