Still, whether we like it or not, the task of speeding up the decrease of the human population becomes increasingly urgent.

...aesthetic values are changed under the influence of sexual emotion; from the lover's point of view many things are beautiful which are unbeautiful from the point of view of him who is not a lover, and the greater the degree to which the lover is swayed by his passion the greater the extent to which his normal aesthetic standard is liable to be modified.

We cannot be sure that we ought not to regard the most criminal country as that which in some aspects possesses the highest civilization.

No faith is our own that we have not arduously won.

Every ist writes his own autobiography.

There is held to be no surer test of civilization than the increase per head of the consumption of alcohol and tobacco. Yet alcohol and tobacco are recognizable poisons, so that their consumption has only to be carried far enough to destroy civilization altogether.

Dreams are real as long as they last. Can we say more of life?