The discoveries of yesterday are the truisms of tomorrow, because we can add to our knowledge but cannot subtract from it.

The prerequisite of originality is the art of forgetting, at the proper moment, what we know.

If conquerors be regarded as the engine-drivers of History, then the conquerors of thought are perhaps the pointsmen who, less conspicuous to the traveler's eye, determine the direction of the journey.

One may not regard the world as a sort of metaphysical brothel for emotions.

When all is said, its atmosphere [England's] still contains fewer germs of aggression and brutality per cubic foot in a crowded bus, pub or queue than in any other country in which I have lived

Two half-truths do not make a truth, and two half- cultures do not make a culture

Without the hard little bits of marble which are called 'facts' or 'data' one cannot compose a mosaic; what matters, however, are not so much the individual bits, but the successive patterns into which you arrange them, then break them up and rearrange them.