To introduce something altogether new would mean to begin all over, to become ignorant again, and to run the old, old risk of failing to learn.
More from Isaac Asimov
Those people who think they know everything are a great annoyance to those of us who do.
Permalink to quote #56 True literacy is becoming an arcane art and the United States is steadily dumbing down.
Permalink to quote #58 There is a single light of science, and to brighten it anywhere is to brighten it everywhere.
Permalink to quote #55