To create a healthy philosophy you should renounce metaphysics but be a good mathematician.

In any closet, you can find it, if it is too small, or out of style, or there is just one of it where there should be two

The Eugenic Society . . . is perpetually bewailing the fact that wage-earners breed faster than middle-class people.

The Christian view that all intercourse outside marriage is immoral was, as we see in the above passages from St. Paul, based upon the view that all sexual intercourse, even within marriage, is regrettable. A view of this sort, which goes against biological facts, can only be regarded by sane people as a morbid aberration. The fact that it is embedded in Christian ethics has made Christianity throughout its whole history a force tending towards mental disorders and unwholesome views of life.

Opinions which justify cruelty are inspired by cruel impulses.

I do not pretend to start with precise questions. I do not think you can start with anything precise. You have to achieve such precision as you can, as you go along.

On the one hand, philosophy is to keep us thinking about things that we may come to know, and on the other hand to keep us modestly aware of how much that seems like knowledge isn't knowledge