Work harder on yourself than you do on your job.

In the survival of favoured individuals and races, during the constantly-recurring struggle for existence, we see a powerful and ever-acting form of selection.

If man limits himself to a satisfied animal existence, and asks from life only what such an existence can give, the higher values of life at once disappear.

Doing nothing is happiness for children and misery for old men.

Not all things are to be discovered; many are better concealed.

Life is a succession of lessons which must be lived to be understood.

A man's true character comes out when he's drunk.

One man with a gun can control 100 without one.

During your life, never stop dreaming. No one can take away your dreams

The more I see, the less I know for sure.

Let the guarantee of free speech be in every man's determination to use it, and we shall have no need of paper declarations.

The natural world is the greatest source of excitement. The greatest source of visual beauty. It is the greatest source of so much in life that makes life worth living.

We all learn lessons in life. Some stick, some don't. I have always learned more from rejection and failure than from acceptance and success.

The future starts today, not tomorrow.

Eventually all things fall into place. Until then, laugh at the confusion, live for the moments, and know everything happens for a reason.

Let silence take you to the core of life.

Life is made up of marble and mud.

In the long history of humankind (and animal kind, too) those who learned to collaborate and improvise most effectively have prevailed

The way to know life is to love many things.

Life is a disease, brother, and death begins already at birth. Every breath, every heartbeat, is a moment of dying - a little shove toward the end.

In order to seek truth, it is necessary once in the course of our life to doubt, as far as possible, of all things.