Strength does not come from physical capacity. It comes from an indomitable will.

We are all born ignorant, but one must work hard to remain stupid

Happiness is not an ideal of reason, but of imagination.

He who conquers others is strong; he who conquers himself is mighty.

Loneliness adds beauty to life. It puts a special burn on sunsets and makes night air smell better.

I wanted to change the world. But I have found that the only thing one can be sure of changing is oneself.

A friend to all is a friend to none

An understanding of the natural world is a source of not only great curiosity, but great fulfilment.

Those who see the invisible can do the impossible.

Above all be of single aim; have a legitimate and useful purpose, and devote yourself unreservedly to it.

Nobody made a greater mistake than he who did nothing because he could do only a little.

I've come to believe that all my past failure and frustration were actually laying the foundation for the understandings that have created the new level of living I now enjoy.

Those who can not change their minds can not change anything.

I have had good experience and trial of this world...I know what it is to be a subject, what to be a sovereign, what to have good neighbours, and sometimes meet evil willers. I have found treason in trust, seen great benefits little regarded.

All differences in this world are of degree, and not of kind, because oneness is the secret of everything.

Nature is pleased with simplicity. And nature is no dummy

Never put off for tomorrow, what you can do today.

Adapt what is useful, reject what is useless, and add what is specifically your own.

The greatest deception men suffer is from their own opinions.

It takes a great man to be a good listener.

A person reveals his character by nothing so clearly as the joke he resents.