Passion's a good, stupid horse that will pull the plough six days a week if you give him the run of his heels on Sundays. But love's a nervous, awkward, over-mastering brute; if you can't rein him, it's best to have no truck with him.

It is as dangerous for people unaccustomed to handling words and unacquainted with their technique to tinker about with these heavily-charged nuclei of emotional power as it would be for me to burst into a laboratory and play about with a powerful electromagnet or other machine highly charged with electrical force.

the truth and value of a theory does not depend on the number of people who are interested in it - otherwise you might compare the number of people who follow the predictions of astrologers in the daily press with those who attend lectures by Einstein, and conclude that astrology was more valuable and true than physics.

Once lay down the rule that the job comes first and you throw that job open to every individual, man or woman, fat or thin, tall or short, ugly or beautiful, who is able to do that job better than the rest of the world.

The popular mind has grown so confused that it is no longer able to receive any statement of fact except as an expression of personal feeling.

Wherever you find a great man, you will find a great mother or a great wife standing behind him -- or so they used to say. It would be interesting to know how many great women have had great fathers and husbands behind them.

To make a precise scientific description of reality out of words is like trying to build a rigid structure out of pure quicksilver.