The great achievements of the past were the adventures of the past. Only the adventurous can understand the greatness of the past.
That knowledge which adds greatness to character is knowledge so handled as to transform every phase of immediate experience.
Every intellectual revolution which has ever stirred humanity into greatness has been a passionate protest against inert ideas. Then, alas, with pathetic ignorance of human psychology, it has proceeded by some educational scheme to bind humanity afresh with inert ideas of its own fashioning.