And it is through strife and the readiness for strife that a man or a nation must win greatness. So, let the world know that we are here and willing … - Theodore Roosevelt

A man who has never gone to school may steal a freight car; but if he has a university education, he may steal the whole railroad.

Speak softly and carry a big stick.

Indeed, it is a sign of marked political weakness in any
commonwealth if the people tend to be carried away by mere oratory, if they
tend to value words in and for themselves, as divorced from the deeds for which
they are supposed to stand. The phrase-maker, the phrase-monger, the ready
talker, however great his power, whose speech does not make for courage,
sobriety, and right understanding, is simply a noxious element in the body
politic, and it speaks ill for the public if he has influence over them. To admire
the gift of oratory without regard to the moral quality behind the gift is to do
wrong to the republic.