We may encounter many defeats but we must not be defeated.

We sometimes congratulate ourselves at the moment of waking from a troubled dream; it may be so the moment after death.

Medicine heals diseases of the body, wisdom frees the soul from passions.

Kind words don't cost much. Yet they accomplish much.

The first thing you'll have to do, is the last thing you wished.

Thought can be so seductive and hypnotic that it absorbs your attention totally, so you become your thoughts.

There are no eternal facts, as there are no absolute truths.

Honesty is the first chapter in the book of wisdom.

A common mistake that people make when trying to design something completely foolproof is to underestimate the ingenuity of complete fools.

I believe that one defines oneself by reinvention. To not be like your parents. To not be like your friends. To be yourself. To cut yourself out of stone.

When you learn, teach, when you get, give.

Learn from the mistakes of others. You can never live long enough to make them all yourself.

Do not pray for an easy life, pray for the strength to endure a difficult one.

Knowledge speaks, but wisdom listens

Half the world is composed of people who have something to say and can't, and the other half who have nothing to say and keep on saying it.

You don't become what you want, you become what you believe

The ultimate authority must always rest with the individual's own reason and critical analysis.

We choose our joys and sorrows long before we experience them.

Be silent or let thy words be worth more than silence.

Science may set limits to knowledge, but should not set limits to imagination.

It takes a great deal of bravery to stand up to our enemies, but just as much to stand up to our friends.