Amongst all other vices there is none I hate more than cruelty, both by nature and judgment, as the extremest of all vices.

If there is such a thing as a good marriage, it is because it resembles friendship rather than love.

The concern that some women show at the absence of their husbands, does not arise from their not seeing them and being with them, but from their apprehension that their husbands are enjoying pleasures in which they do not participate, and which, from their being at a distance, they have not the power of interrupting.

I enter into discussion and argument with great freedom and ease, inasmuch as opinion finds me in a bad soil to penetrate and take deep root in. No propositions astonish me, no belief offends me, whatever contrast it offers to my own. There is no fancy so frivolous and so extravagant that it does not seem to me quite suitable to the production of the human mind.

The height and value of true virtue consists in the facility, utility, and pleasure of its exercise; so far from difficulty, that boys, as well as men, and the innocent as well as the subtle, may make it their own; and it is by order and good conduct, and not by force, that it is to be acquired.

Whenever a new finding is reported to the world people say - It is probably not true. Later on, when the reliability of a new finding has been fully confirmed, people say - OK, it may be true but it has no real significance. At last, when even the significance of the finding is obvious to everybody, people say - Well, it might have some significance, but the idea is not new.

The world is but a perennial movement. All things in it are in constant motion-the earth, the rocks of the Caucasus, the pyramids of Egypt-both with the common motion and with their own.