Your most unhappy customers are your greatest source of learning.

We always overestimate the change that will occur in the next two years and underestimate the change that will occur in the next ten.

I choose a lazy person to do a hard job. Because a lazy person will find an easy way to do it.

Success is a lousy teacher. It seduces smart people into thinking they can't lose.

If you are born poor it's not your mistake, but if you die poor it's your mistake.

It is hard to retain what you learn unless you practice it.

-- Seneca

I know that I do not know.

-- Plato

I know that I know nothing.

-- Socrates

The highest goodness is like water. Water benefits all things and does not compete; it dwells in places others disdain, and so is close to the Tao.

-- Laozi

The trouble with people is that they love playing teacher to others.

-- Mencius

When three walk together, one is surely my teacher. I follow what is good and correct what is not.

-- Confucius