Nothing is born of nothing, least of all knowledge, modernity, or enlightened thought; progress is made in tiny surges, in successive laps, like an endless relay race. But there are links without which nothing would be passed on, and for that reason, they deserve the gratitude of all who benefited from them.
Origins: A Memoir (ed. Farrar, Straus and Giroux, 2008) - ISBN: 9781429953634