After all, many of you have probably read/experienced dozens of books/papers/articles about many subjects. Not just science, but social science, whatever cultures you happen to be interested in, and the communities you grew up in. And of course, most people you talk to will only appreciate your knowledge of a small fraction of the total sum of all your knowledge (probably depending on your mutual interests, although most people have mutual interests that don't intersect very much as compared to the fraction of all their interests). And I feel like this will only get bigger as I grow older and learn more. Perhaps this feeling depends on how you want other people to see you.