Gold, silver, jewels, purple garments, houses built of marble, groomed estates, pious paintings, caparisoned steeds, and other things of this kind offer a mutable and superficial pleasure; books give delight to the very marrow of one's bones. They speak to us, consult with us, and join with us in a living and intense intimacy.
PetrarchContinued work and application form my soul's nourishment. So soon as I commenced to rest and relax I should cease to live.
Petrarch