Ardor, n. The quality that distinguishes love without knowledge.

In expanding the field of knowledge we but increase the horizon of ignorance.

Evil being the root of mystery, pain is the root of knowledge.

I'll come to you with gifts of knowledge, wisdom and truth.

A man of knowledge lives by acting, not by thinking about acting.

The one exclusive sign of thorough knowledge is the power of teaching.

Our knowledge is a receding mirage in an expanding desert of ignorance.

Our knowledge is the amassed thought and experience of innumerable minds.

Knowledge and wisdom are both the signs of hunger and thirst of creativity.

“Only knowledge can turn life's unbearableness into a weapon.”