"When we are out of sympathy with the young, then I think our work in this world is over"

"A leader is best when people barely know he exists, when his work is done, his aim fulfilled, they will say: we did it ourselves"

"Talent in cheaper than table salt. What separates the talented individual from the successful one is a lot of hard work"

"The young man knows the rules, but the old man knows the exceptions"

"One machine can do the work of fifty ordinary men. No machine can do the work of one extraordinary man"

"Work spares us from three evils: boredom, vice, and need"

"The best preparation for good work tomorrow is to do good work today"

"I was married to Margaret Joan Howe in 1940. Although not a scientist herself she has contributed more to my work than anyone else by providing a peaceful and happy home"

"Young men have a passion for regarding their elders as senile"

"Youth is not a question of years: one is young or old from birth"

"It is the quality of our work which will please God and not the quantity"