“In books “we converse with the wise, as in action with fools.” That is, if we know how to select our books. “Some books are to be tasted,” reads a famous passage, “others to be swallowed, and some to be chewed and digested”; all these groups forming, no doubt, an infinitesimal portion of the oceans and cataracts of ink in which the world is daily bathed and poisoned and drowned.”