The best practical advice I can give to the present generation is to practice the virtue which the Christians call love.

It is the things for which there is no evidence that are believed with passion.

I am not myself in any degree ashamed of having changed my opinions.

If any philosopher had been asked for a definition of infinity, he might have produced some unintelligible rigmarole, but he would certainly not have been able to give a definition that had any meaning at all.

Moral progress has consisted in the main of protest against cruel customs, and of attempts to enlarge human sympathy.

The most savage controversies are about matters as to which there is no good evidence either way.

When you meet with opposition, even if it should be from your husband or your children, endeavor to overcome it by argument and not by authority, for a victory dependent upon authority is unreal and illusory.