There are two Americas. One is the America of Lincoln and Adlai Stevenson; the other is the America of Teddy Roosevelt and the modern superpatriots. One is generous and humane, the other narrowly egotistical; one is self-critical, the other self-righteous; one is sensible, the other romantic; one is good-humored, the other solemn; one is inquiring, the other pontificating; one is moderate, the other filled with passionate intensity; one is judicious and the other arrogant in the use of great power.

We must care to think about the unthinkable things, because when things become unthinkable, thinking stops and action becomes mindless.

I do not think it is "selling America short" when we ask a great deal of her; on the contrary, it is those who ask nothing, those who see no fault, who are really selling America short!

We must dare to think 'unthinkable' thoughts. We must learn to explore all the options and possibilities that confront us in a complex and rapidly changing world.

We must dare to think unthinkable thoughts.

Some new machinery with adequate powers must be created now if our fine phrases and noble sentiments are to have substance and meaning for our children.

The Program further aims to make the benefits of American culture and technology available to the world and to enrich American life by exposing it to the science and art of many societies.