A great man represents a great ganglion in the nerves of society, or to vary the figure, a strategic point in the campaign of history, and part of his greatness consists in his being there.

Old age is fifteen years older than I am.

Even for practical purposes theory generally turns out the most important thing in the end.

In my opinion, economists and sociologists are the people to whom we ought to turn more than we do for instruction in the grounds and foundations of all rational decisions.

We must think things not words, or at least we must constantly translate our words into the facts for which they stand, if we are to keep to the real and the true.

On every stem, on every leaf,... and at the root of everything that grew, was a professional specialist in the shape of grub, caterpillar, aphis, or other expert, whose business it was to devour that particular part.

Where we stand is not as important as the direction in which we are moving.