We coin concepts and we use them to analyse and explain nature and society. But we seem to forget, midway, that these concepts are our own constructs and start equating them with reality.
The conservation of our natural resources and their proper use constitute the fundamental problem which underlies almost every other problem of our national life.
To become indignant at [people's] conduct is as foolish as to be angry with a stone because it rolls into your path. And with many people the wisest thing you can do, is to resolve to make use of those whom you cannot alter.
I have too many friends who tell me that they spend the first hour of every morning going through their e-mail messages. I'd like to use my time more carefully.