The reasonable man adapts himself to the world; the unreasonable one persists to adapt the world to himself. Therefore all progress depends on the un….

People who say it cannot be done should not interrupt those who are doing it..

Now that we have learned to fly the air like birds, swim under water like fish, we lack one thing - to learn to live on earth as human beings..

The test of a man or woman's breeding is how they behave in a quarrel..

The longer I live, the more convinced am I that this planet is used by other planets as a lunatic asylum..

A socialist is somebody who doesn't have anything, and is ready to divide it up equally among everybody..

A life spent making mistakes is not only more honorable, but more useful than a life spent doing nothing..

Newspaper : A device unable to distinguish between a bicycle accident and the collapse of civilisation..

Beware of false knowledge; it is more dangerous than ignorance..

Both optimists and pessimists contribute to society. The optimist invents the aeroplane, the pessimist the parachute..

We don't stop playing because we grow old; we grow old because we stop playing..

Most people do not pray; they only beg..

Write your Sad times in Sand, Write your Good times in Stone..

Life isn't about finding yourself. Life is about creating yourself..

This is the true joy in life: Being used for a purpose recognized by yourself as a mighty one, being a force of nature instead of a feverish, selfish….

Progress is impossible without change; and those who cannot change their minds cannot change anything..

Experience fails to teach where there is no desire to learn..

War does not decide who is right but who is left..

Our necessities are few, but our wants are endless..

Our lives are shaped not as much by our experiences as by our expectations..

I learned long ago, never to wrestle with a pig. You get dirty, and besides, the pig likes it..