It is to the body alone that we should attribute everything that can be observed in us to oppose our reason.

We do not describe the world we see, we see the world we can describe.

Whenever anyone has offended me, I try to raise my soul so high that the offense cannot reach it.

De omnibus dubitandum

Divide each difficulty into as many parts as is feasible and necessary to resolve it.

Conquer yourself rather than the world.

The reading of all good books is like a conversation with the finest minds of past centuries.

The chief cause of human errors is to be found in the prejudices picked up in childhood.

Doubt is the origin of wisdom

The only thing we have power over in the universe is our own thoughts.

How can you be certain that your whole life is not a dream?

It may seem like the dragons tormenting you are bigger and fiercer than those lurking in your neighbor’s yard, but this is an illusion. We all face mighty dragons at home in some form.

There's "good" in all things. You just have to find it.

Talent is helpful in writing but guts are absolutely necessary.

Ethics and religion must not stay at home when we go to work.

I'm glad I get singled out for my slide guitar-playing, which isn't that difficult to do. I didn't take guitar lessons, but I just love the way it sounds, almost like the human voice.

I have broken my collarbone twice in a year.

I find that many entrepreneurs are trying to do everything when it would be cheaper and more time-efficient to delegate, even if there are monetary costs associated with that.

Be patient and wait. Your mud will settle. Your water will be clear.

The Social Security trust fund is in pretty good shape today and we should not embark upon risky, dangerous schemes which will, in fact, undermine Social Security, such as privatization.

A true measure of an entrepreneur / successful-person is how they deal with adversity.