The truly educated man is not a man who knows a bit of everything, not even the man who knows all the details of all subjects (if such a thing were possible): the “whole man” in fact, may have little detailed knowledge of facts and theories...but he will be truly in touch with the centre. He will not be in doubt about his basic convictions, about his view on the meaning and purpose of his life. He may not be able to explain these matters in words, but the conduct of his life will show a certain sureness of touch which stems from this inner clarity.
"Small is Beautiful: A Study of Economics As If People Mattered". Book by E. F. Schumacher, 1973.