Knowledge is exploding at such a rate—more than 2000 pages a minute—that even Einstein couldn’t keep up. In fact, if you read 24 hours a day, from age 21 to 70, and retained all you read, you would be one and a half million years behind when you finished. How can it be, in a world where half the things a man knows at 20 are no longer true at 40—and half the things he knows at 40 hadn’t been discovered when he was 20? (Campus Life, Feb., 1979).