Man is the only animals of which I am thoroughly and cravenly afraid.
When a stupid man is doing something he is ashamed of, he always declares that it is his duty.
We must not stay as we are, doing always what was done last time, or we shall stick in the mud. Yet neither must we undertake a new world as catastrophic Utopians, and wreck our civilization in our hurry to mend it.
Use your health, even to the point of wearing it out.
A miracle, my friend, is an event which creates faith.
You see things and you say, 'Why?'. But I dream things and I say, 'Why not?'.