Louis Nizer (1902–1994)
Books are standing counselors and preachers, always at hand, and always disinterested; having this advantage over oral instructors, that they are ready to repeat their lesson as often as we please. (ang.)
Źródło: Mark Phillips, Vocabulary Dictionary and Workbook. 2,856 Words You Must Know, A.J. Cornell Publications, 2006, s. 132.