Caution is the confidential agent of selfishness.

The only use of an obstacle is to be overcome. All that an obstacle does with brave men is, not to frighten them, but to challenge them.

America cannot be an ostrich with its head in the sand.

A powerful Navy we have always regarded as our proper and natural means of defense; and it has always been of defense that we have thought, never of aggression or of conquest. But who shall tell us now what sort of Navy to build? We shall take leave to be strong upon the seas, in the future as in the past; and there will be no thought of offense or provocation in that. Our ships are our natural bulwarks.

No student knows his subject: the most he knows is where and how to find out the things he does not know

There is no higher religion than human service. To work for the common good is the greatest creed.

We are expected to put the utmost energy, of every power that we have, into the service of our fellow men, never sparing ourselves, not condescending to think of what is going to happen to ourselves, but ready, if need be, to go to the utter length of self-sacrifice.