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.

The satisfaction to be derived from success in a great constructive enterprise is one of the most massive that life has to offer.

Each act of cruelty is eternally a part of the universe; nothing that happens later can make that act good rather than bad, or can confer perfection on the whole of which it is a part.

If there were in the world today any large number of people who desired their own happiness more than they desired the unhappiness of others, we could have a paradise in a few years.

Physics is mathematical not because we know so much about the physical world, but because we know so little; it is only its mathematical properties that we can discover.

More cranks take up unfashionable errors than unfashionable truths.

Cruelty is, in theory, a perfectly adequate ground for divorce, but it may be interpreted so as to become absurd.