The only true wisdom is in knowing you know nothing.

There is only one good, knowledge, and one evil, ignorance.

The more I see, the less I know for sure.

The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge.

Wisdom is the daughter of experience.

Imagination is more important than knowledge. Knowledge is limited. Imagination encircles the world.

The most important knowledge is that which guides the way you lead your life.

I have been impressed with the urgency of doing. Knowing is not enough, we must apply. Being willing is not enough, we must do.

The noblest pleasure is the joy of understanding.