A person who spends more than he earns is a fool

Knowledge speaks, but wisdom listens

Act as if the maxim of your action were to become through your will a general natural law

The only limit to our realization of tomorrow will be our doubts of today.

There is always time to add a word, never to withdraw one.

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

Intelligence is the ability to adapt to change.

In anger we should refrain both from speech and action.

The greatest of wealth is the richness of the soul.

We thought that we had the answers, it was the questions we had wrong.

I know I am but mortal and so therewhilst prepare myself for death, whensoever it shall please God to send it.

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

The greatest minds are capable of the greatest vices as well as of the greatest virtues.

And no one will listen to us until we listen to ourselves.

You are the bows from which your children as living arrows are sent forth.

What a liberation to realize that the “voice in my head” is not who I am. Who am I then? The one who sees that.

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

Fear doesn't exist anywhere except in the mind.

Boredom is the root of all evil - the despairing refusal to be oneself.

Having a great intellect is no path to being happy.

A man may imagine things that are false, but he can only understand things that are true.