As a child I was mostly interested in biology, poetry, physics and mathematics, as a teenager I got interested in history, religion, languages and (of course) computers. I was (am?) pretty much sure that in order to study religion I'd need a solid background in history, in order to understand physics I needed to know math and chemistry better, and so on so forth... Eventually I had to make a choice and it turned out to be Mathematics, but I always felt I was "missing" something by not studying biology, or physics, or chemistry, or poetry...
My question is: How to deal with the fact that you won't ever know everything, even inside your field of research? How to deal with the amount of complexity we've produced in the last centuries?
You know, in the old days of science people used to be mathematicians, physicists, chemists and even found time to do a little bit of poetry and painting...