“The old and the young, he thought. The old, who do not care; the young, who do not think.”

“No one who is young is ever going to be old.”

“The young people think the old people are fools -- but the old people know the young people are fools.”

“Young men think old men are fools; but old men know young men are fools.”

“No matter how old an individual may be, no matter if he is young or old, if he thinks in accordance with the times he is immortal.”

“Young men, hear an old man to whom old men hearkened when he was young.”

“The whole world is burdened with young fogies. Old men with ossified minds are easily dealt with. But men who look young, act young, and everlastingly harp on the fact they are young, but who nevertheless think and act with a degree of caution which would be excessive in their grandfathers, are the curses of the world.”

“Those who love deeply never grow old; they may die of old age, but they die young.”

“The young man who has not wept is a savage, and the old man who will not laugh is a fool.”

“I've always thought that the stereotype of the dirty old man is really the creation of a dirty young man who wants the field to himself.”