Presidents have only two moments of personal seclusion. One is prayer; the other fishing - and they cannot pray all the time!

We cannot change ideas in the minds of men and races with machine guns or battle ships.

Above all, we know that although Americans can be led to make great sacrifices, they do not like to be driven.

The great liability of the engineer compared to men of other professions is that his works are out in the open where all can see them. His acts, step by step, are in hard substance. He cannot bury his mistakes in the grave like the doctors. He cannot argue them into thin air or blame the judge like the lawyers. He cannot, like the architects, cover his failures with trees and vines. He cannot, like the politicians, screen his shortcomings by blaming his opponents and hope the people will forget. The engineer simply cannot deny he did it. If his works do not work, he is damned.

The advancement of knowledge must be translated into increasing health and education for the children.

Absolute freedom of the press to discuss public questions is a foundation stone of American liberty.

New discoveries in science and their flow of new inventions will continue to create a thousand new frontiers for those who still would adventure.