Optimism is essential to achievement and it is also the foundation of courage and true progress.

The world is divided into three kinds of people: A very small group that makes things happen; a somewhat larger group that watches things happen; and a great multitude that never knows what has happened.

Every attempt, by whatever authority, to fix a maximum of productive labor by a given worker in a given time is an unjust restriction upon his freedom and a limitation of his right to make the most of himself in order that he may rise in the scale of the social and economic order in which he lives. The notion that all human beings born into this world enter at birth into a definite social and economic classification, in which classification they must remain permanently through life, is wholly false and fatal to a progressive civilization.

Modern mathematics, that most astounding of intellectual creations, has projected the mind's eye through infinite time and the mind's hand into boundless space.

Optimism is essential to achievement and it is also the foundation of courage and true progress.

I divide the world into three Classes - The few who make things happen, the many who watch things happen, the overwhelming majority who have no notion of what happens.

The old world order changed when this war-storm broke. The old international order passed away as suddenly, as unexpectedly, and as completely as if it had been wiped out by a gigantic flood, by a great tempest, or by a volcanic eruption. The old world order died with the setting of that day's sun and a new world order is being born while I speak, with birth-pangs so terrible that it seems almost incredible that life could come out of such fearful suffering and such overwhelming sorrow.