Knowledge is ancient error reflecting on its youth.

To express the same idea in still another way, I think that human knowledge is essentially active.

This means that no single logic is strong enough to support the total construction of human knowledge.

The current state of knowledge is a moment in history, changing just as rapidly as the state of knowledge in the past has ever changed and, in many instances, more rapidly.

Scientific knowledge is in perpetual evolution; it finds itself changed from one day to the next.

Our problem, from the point of view of psychology and from the point of view of genetic epistemology, is to explain how the transition is made from a lower level of knowledge to a level that is judged to be higher.

In other words, knowledge of the external world begins with an immediate utilisation of things, whereas knowledge of self is stopped by this purely practical and utilitarian contact.

It is with children that we have the best chance of studying the development of logical knowledge, mathematical knowledge, physical knowledge, and so forth.

Seldom ever was any knowledge given to keep, but to impart; the grace of this rich jewel is lost in concealment.

My philosophy of leadership is to surround myself with good people who have ability, judgment and knowledge, but above all, a passion for service.

Humility and knowledge in poor clothes excel pride and ignorance in costly attire.

Knowledge is the treasure of a wise man.

Science knows no country, because knowledge belongs to humanity, and is the torch which illuminates the world. Science is the highest personification of the nation because that nation will remain the first which carries the furthest the works of thought and intelligence.

Vanity of science. Knowledge of physical science will not console me for ignorance of morality in time of affliction, but knowledge of morality will always console me for ignorance of physical science.

The knowledge of God is very far from the love of Him.