It is rightly laid down that 'true knowledge is knowledge by causes'. Also the establishment of four causes is not bad: material, formal, efficient and final.

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.

I am intrigued by the beauty of love.I was moved by the love of beauty.

The key to getting the record is running fast because someone else did not take it too crazy at the beginning, so it leaves me with a lot of energy to close.

We hated the Giants. We just hated the uniform.

Which [the cyber hacking] is why one of the first things we must do is to enforce all classification rules and to enforce all laws relating to the handling of classified information.

Occasionally I sense an insane wail deep down in the pit, the echo alone reaching me, striking without warning, a child weeping uninhibitedly, imprisoned forever.

Usually when I go to the Summer Exhibition, I think every room is too much the same, and I loose my capacity to look at individual works.

I'm very much afraid of being mad - that's my one fear.

The Nobel is a ticket to one's own funeral. No one has ever done anything after he got it.

No matter what feeling comes up - numbness, irritability, shame - if I let it arise and play itself through, I naturally open into wakefulness and care.

I found a wonderful woman, a great girl and I am excited to have her as a part of my life.