Learning and wisdom are superfluities, the surface glitter merely, but it is the heart that is the seat of all power.

A man who as a physical being is always turned toward the outside, thinking that his happiness lies outside him, finally turns inward and discovers that the source is within him.

A friend to all is a friend to none

The difference between stupidity and genius is that genius has its limits.

Colorless green ideas sleep furiously

In the practice of tolerance, one's enemy is the best teacher.

The object of the superior man is truth.

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 first thing you'll have to do, is the last thing you wished.

An understanding of the natural world is a source of not only great curiosity, but great fulfilment.

Real knowledge is to know the extent of one's ignorance.

Choose rather to be strong of soul than strong of body.

Generosity is giving more than you can, and pride is taking less than you need.

Whatever it is you're seeking won't come in the form you're expecting.

A good teacher protects his pupils from his own influence.

The best revenge is to be unlike him who performed the injury.

Rest satisfied with doing well, and leave others to talk of you as they please.

There is geometry in the humming of the strings. There is music in the spacing of the spheres.

If you don't know where you're from, you'll have a hard time saying where you're going.

We choose our joys and sorrows long before we experience them.

I am a lover of truth, a worshipper of freedom, a celebrant at the altar of language and purity and tolerance.