I was lucky enough to know exactly what I wanted to do when I was growing up. I think one of the hardest things to figure out in life is what your calling is, and what truly makes you happy - not what you want to work at, but what you want to do.
For years, I've had a hankering for the portrait of Benjamin Franklin by Joseph Duplessis. Franklin is credited with so many inventions: the postal system, lightning rods, the constitution. He was a rock star before there was such a thing.
Programming is not a zero-sum game. Teaching something to a fellow programmer doesn't take it away from you. I'm happy to share what I can, because I'm in it for the love of programming.