“To express the same idea in still another way, I think that human knowledge is essentially active.”– Jean Piaget Related Quotes “It has been common knowledge to informed collectors that many times the finest and rarest art glass is found unsigned.”– James Lafferty “The apple cannot be stuck back on the Tree of Knowledge once we begin to see, we are doomed and challenged to seek the strength to see more, not less.”– Arthur Miller “Love, work, and knowledge are the wellsprings of our lives, they should also govern it.”– Wilhelm Reich