Everything excellent is as difficult as it is rare.
Knowing is not enough, we must apply. Willing is not enough, we must do.
To live is not merely to breathe; it is to act; it is to make use of our organs, senses, faculties - of all those parts of ourselves which give us the feeling of existence
The impossible could not have happened, therefore the impossible must be possible in spite of appearances.
Learned we may be with another man's learning: we can only be wise with wisdom of our own.
The absent are never without fault, nor the present without excuse.
To be one, to be united is a great thing. But to respect the right to be different is maybe even greater.
Do your little bit of good where you are; it's those little bits of good put together that overwhelm the world.
I think, therefore I am.
An intelligent hell would be better than a stupid paradise.
To do great things is difficult, but to command great things is more difficult.
Science has not yet taught us if madness is or is not the sublimity of the intelligence.
Science may set limits to knowledge, but should not set limits to imagination.
Think no vice so small that you may commit it, and no virtue so small that you may over look it.
In order to change the world, you have to get your head together first
None but ourselves can free our minds.
Science is organized knowledge. Wisdom is organized life.
Talent is God given. Be humble. Fame is man-given. Be grateful. Conceit is self-given. Be careful.
Our virtues and our failings are inseparable, like force and matter. When they separate, man is no more
You are not a drop in the ocean. You are the entire ocean, in a drop.
Whatever you think the world is withholding from you, you are withholding from the world.