Knowledge

Knowledge is happiness, because to have knowledge—broad, deep knowledge—is to know true ends from false, and lofty things from low. To know the thoughts and deeds that have marked man's progress is to feel the great heartthrobs of humanity through the centuries; and if one does not feel in these pulsations a heavenward striving, one must indeed be deaf to the harmonies of life.

—Helen keller: The Story of My Life