Virtue is the habit of acting according to wisdom.

Take what you need, do what you should, you will get what you want.

Everything that is possible demands to exist.

Every present state of a simple substance is the natural consequence of its preceding state, in such a way that its present is big with its future.

Every mind has a horizon in respect to its present intellectual capacity but not in respect to its future intellectual capacity.

To love is to be delighted by the happiness of someone, or to experience pleasure upon the happiness of another. I define this as true love.

The greatness of a life can only be estimated by the multitude of its actions. We should not count the years, it is our actions which constitute our life.

Music is a hidden arithmetic exercise of the soul, which does not know that it is counting.

Imaginary numbers are a fine and wonderful refuge of the divine spirit almost an amphibian between being and non-being.

We may say, that not only the soul (the mirror of an indestructible universe) is indestructible, but also the animal itself is, although its mechanism is frequently destroyed in parts.

The present is saturated with the past and pregnant with the future.

Family's the most important thing.

Time is the enemy of freedom.

In not having an appointment at Harvard, I'm in the company of a great many people whose work I admire tremendously, in particular women of color.

Two things remain irretrievable: time and a first impression.

Independent thinkers are usually geniuses or idiots and at times it's hard to tell which.

For every bad there might be a worse; and when one breaks his leg let him be thankful it was not his neck.

My "home" is a controversial topic. I don't exactly have one. I live all over the world.

I was hoping he would get up so I could hit him again and keep him down.

Be just before you are generous.

All writing is in fact cut-ups. A collage of words read heard overheard. What else?