Love should be a tree whose roots are deep in the earth, but whose branches extend into heaven.

The . . . increase in the power of officials is a constant source of irritation to everybody else.

Understanding human nature must be the basis of any real improvement in human life. Science has done wonders in mastering the laws of the physical world, but our own nature is much less understood, as yet, than the nature of stars and electrons. When science learns to understand human nature, it will be able to bring a happiness into our lives which machines and the physical sciences have failed to create.

The essence of the liberal outlook lies not in what opinions are held, but in how they are held; instead of being held dogmatically, they are held tentatively, and with a consciousness that new evidence may at any moment lead to their abandonment.

Never let yourself be diverted, either by what you wish to believe, or what you think could have beneficent social effects if it were believed; but look only and solely at what are the facts.

It was the duty of wives to submit to husbands, not of husbands to submit to wives. . . men have stronger muscles than women.

Mathematics may be defined as the subject in which we never know what we are talking about, nor whether what we are saying is true.