Wear your learning, like your watch, in a private pocket, and do not pull it out and strike it merely to show you have one. If you are asked what o'clock it is, tell it, but do not proclaim it hourly and unasked, like the watchman. - Lord Chesterfield, statesman and writer (1694-1773)
This quote reminds me very much of my two brothers and my father. They are all learned men, and all modest about it.