Power always thinks it has a great soul and vast views beyond the comprehension of the weak.

It is the mark of an educated mind to be able to entertain a thought without accepting it.

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.

The ultimate authority must always rest with the individual's own reason and critical analysis.

The cure for pain is in the pain.

Men become wise just as they become rich, more by what they save than by what they receive.

I think about the meaning of pain. Pain is personal. It really belongs to the one feeling it. Probably the only thing that is your own. I like mine.

Obsession is the wellspring of genius and madness.

When you learn, teach, when you get, give.

He who is slowest in making a promise is most faithful in its performance.

Most of what matters in our lives takes place in our absence.

The use of travelling is to regulate imagination by reality, and instead of thinking how things may be, to see them as they are.

Rational discussion is useful only when there is a significant base of shared assumptions.

To a wise and good man the whole earth is his fatherland.

Intelligence is a moral category.

Wisdom is not the product of schooling, but of the lifelong attempt to acquire it.

Forget not that the earth delights to feel your bare feet and the winds long to play with your hair.

Although our intellect always longs for clarity and certainty, our nature often finds uncertainty fascinating.

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

The noblest pleasure is the joy of understanding.

What you're thinking is what you're becoming.