If knowledge can create problems, it is not through ignorance that we can solve them.

Imagination is more important than knowledge.

In political discussion heat is in inverse proportion to knowledge.

Knowledge is of two kinds. We know a subject ourselves, or we know where we can find information on it.

Knowledge is soon changed, then lost in the mist, an echo half-heard.

Nobody knows the age of the human race, but everybody agrees that it is old enough to know better.

Our knowledge can only be finite, while our ignorance must necessarily be infinite.

Real knowledge is to know the extent of ones ignorance.

The beginning of knowledge is the discovery of something we do not understand.

The confidence of ignorance will always overcome indecision of knowledge.

The first step towards knowledge is to know that we are ignorant.

the longing for love, the search for knowledge, and unbearable pity for the suffering of mankind.

There comes a time when for every addition of knowledge you forget something that you knew before. It is of the highest importance, therefore, not to have useless facts elbowing out the useful ones.

Three passions, simple but overwhelmingly strong, have governed my life:

Wisdom is perishable. Unlike information or knowledge, it cannot be stored in a computer or recorded in a book. It expires with each passing generation.