The history of the building of the American nation may justly be described as a laboratory experiment in understanding and in solving the problems that will confront the world tomorrow.

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

Perhaps we should comprehend these things better were it not for the persistence of the superstition that human beings habitually think. There is no more persistent superstition than this. Linn

America is the best half-educated country in the world.

Optimism is the foundation of courage.

The one serious conviction that a man should have is that nothing is to be taken too seriously.