Similarly, many a young man, hearing for the first time of the refraction of stellar light, has thought that doubt was cast on the whole of astronomy, whereas nothing is required but an easily effected and unimportant correction to put everything right again.

Ernst Mach

Old age is like everything else. To make a success of it, you’ve got to start young.

Theodore Roosevelt

Every young man would do well to remember that all successful business stands on the foundation of morality.

Henry Ward Beecher

Joyfulness keeps the heart and face young. A good laugh makes us better friends with ourselves and everybody around us.

Orison Swett Marden

When a nation’s young men are conservative, its funeral bell is already rung.

Henry Ward Beecher

There is no sadder sight than a young pessimist.

Mark Twain

I was a crazy young man who let himself be blinded by his passions and obeyed only the impulses of the moment.

Gustav Mahler

Woe to the man whose heart has not learned while young to hope, to love - and to put its trust in life.

Joseph Conrad

Anyone who stops learning is old, whether at twenty or eighty. Anyone who keeps learning stays young. The greatest thing in life is to keep your mind young.

Henry Ford

I wish our clever young poets would remember my homely definitions of prose and poetry that is prose words in their best order-poetry the best words in the best order.

Samuel Taylor Coleridge

If you look in the eyes of the young, you see flame. If you look in the eyes of the old, you see light.

Victor Hugo

When I was young I thought that money was the most important thing in life; now that I am old I know that it is.

Oscar Wilde