A million million years gives us some time to prepare for the end . . . let us make the best of it.

Thee might observe incidentally that if the state paid for child-bearing it might and ought to require a medical certificate that the parents were such as to give a reasonable result of a healthy child -- this would afford a very good inducement to some sort of care for the race, and gradually as public opinion became educated by the law, it might react on the law and make that more stringent, until one got to some state of things in which there would be a little genuine care for the race, instead of the present haphazard higgledy-piggledy ways.

A man's acts are partly determined by spontaneous impulse, partly by the conscious and unconscious effects of the various groups to which he belongs.

The method of "postulating" what we want has many advantages; they are the same as the advantages of theft over honest toil.

Although this may seem a paradox, all exact science is based on the idea of approximation. If a man tells you he knows a thing exactly, then you can be safe in inferring that you are speaking to an inexact man.

Zeno was concerned with three problems... These are the problem of the infinitesimal, the infinite, and continuity.

Our beliefs are, however, often contrary to fact.