So long as a man remains a gregarious and sociable being, he cannot cut himself off from the gratification of the instinct of imparting what he is learning, of propagating through others the ideas and impressions seething in his own brain, without stunting and atrophying his moral nature and drying up the surest sources of his future intellectual replenishment.
James Joseph Sylvester (1877). “Address Delivered by J.J. Sylvester, F.R.S. (corresponding Member of the Institute of France), Professor of Mathematics, at Johns Hopkins University on Commemoration Day, February 22, 1877”
