Hence, loathèd Melancholy, Of Cerberus and blackest Midnight born, In Stygian cave forlorn, 'Mongst horrid shapes, and shrieks, and sights unholy. - John Milton

Such as may make thee search the coffers round.

For books are not absolutely dead things, but ...do preserve as in a vial the purest efficacy and extraction of that living intellect that bred them. I know they are as lively, and as vigorously productive, as those fabulous Dragon's teeth; and being sown up and down, may chance to spring up armed men....Yet on the other hand unless wariness be used, as good almost kill a Man as kill a good Book; who kills a Man kills a reasonable creature, God's Image; but he who destroys a good Book, kills reason itself, kills the Image of God, as it were in the eye. Many a man lives a burden to the Earth; but a good Book is the precious life-blood of a master-spirit, embalmed and treasured up on purpose to a life beyond life.

Promiscuous reading is necessary to the constituting of human nature.