“Do what you can, with what you have, where you are.”
“The things that will destroy America are prosperity at any price, peace at any price, safety first instead of duty first and love of soft living and the get-rich-quick theory of life.”
“The only man who never makes mistakes is the man who never does anything.”
“Keep your eyes on the stars, and your feet on the ground.”
“I am an American; free born and free bred, where I acknowledge no man as my superior, except for his own worth, or as my inferior, except for his own demerit.”
“Believe you can and you're halfway there.”
“It is hard to fail, but it is worse never to have tried to succeed.”
Третье в списке немедленно заставило усомниться в авторстве ТР. Предполагаю, что и другие могут быть заимствованиями из других источников.