I'm not trying to tell you," he said "that only educated men are able to...

I'm not trying to tell you," he said "that only educated men are able to contribute something valuable to the world. It's not so.
But I do say that educated and scholarly men, if they're brilliant and creative to begin with--which, unfortunately, is rarely the case--tend to leave infinitely more valuable records behind them than men do who are MEREly brilliant and creative.