War is an invention of the human mind. The human mind can invent peace with justice.

The marvelous pharmacy that was designed by nature and placed into our being by the universal architect produces most of the medicines we need.

History is an accumulation of error.

Where is the indignation about the fact that the US and USSR have thirty thousand pounds of destructive force for every human being in the world?

The message from the moon which we have flashed to the far corners of this planet is that no problem need any longer be considered insoluble.

The capacity for hope is the most significant fact of life. It provides human beings with a sense of destination and the energy to get started.

The growth of the human mind is still high adventure, in many ways the highest adventure on earth.