The divisions of science are not like different lines that meet in one angle, but rather like the branches of trees that join in one trunk.

It is impossible to love and to be wise.

Silence is the sleep that nourishes wisdom.

Begin doing what you want to do now. We are not living in eternity. We have only this moment, sparkling like a star in our hand - and melting like a snowflake.

If a man will begin with certainties, he shall end in doubts, but if he will content to begin with doubts, he shall end in certainties.

All rising to great places is by a winding stair.

It's not what we profess but what we practice that gives us integrity.

Man prefers to believe what he prefers to be true.

There is a difference between happiness and wisdom: he that thinks himself the happiest man is really so; but he that thinks himself the wisest is generally the greatest fool.

Read not to contradict and confute, nor to believe and take for granted... but to weigh and consider.

Life is a marshmallow, easy to chew but hard to swallow.

Therapy to life: Eat with the wise, and drink with the fools!

It is the nature of the wise to resist pleasures, but the foolish to be a slave to them.

Being an entrepreneur means that you are sort of inventing something new. You're giving birth to a company. You're giving birth to a new product, a new service. And that's always exciting.

The law exists to protect the weak from the strong.

There is no reason for any individual to have a computer in their home.

You come home to find your 17-year-old daughter engrossed in a book. Which would delight you more - if it were 'Twilight' or 'Middlemarch?'

You should get to keep every dollar that you earn. That's your money. That's not the government's money.

There's no taking trout with dry breeches.

I'm in a positive space, but I do have my days. Everybody has their days.

No matter how lonely you get or how many birth announcements you receive, the trick is not to get frightened. There's nothing wrong with being alone.