You don’t pay back, you pay forward.

To stay young requires unceasing cultivation of the ability to unlearn old falsehoods.

Learning isn't a means to an end; it is an end in itself.

It is a bad sign when the people of a country stop identifying themselves with the country and start identifying with a group. A racial group. Or a religion. Or a language. Anything, as long as it isn't the whole population.

It is impossible for a man to love his wife whole heartedly without loving all women somewhat. I suppose that the converse must be true of women.

One man's 'magic' is another man's engineering. 'Supernatural' is a null word.

Patriotism is not sentimental nonsense. Nor something dreamed up by demagogues. Patriotism is as necessary a part of man's evolutionary equipment as are his eyes, as useful to the race as eyes are to the individual.