As an aside, this reference makes me happy. The Phantom Tollbooth was one of my favorite books when I was younger, just brilliantly written. So many good lessons about life (the Humbug being a great example). Another great one that is somewhat applicable here is Canby, the regular visitor to the Island of Conclusions, who attempts to be as much as he can be of all things (hence his name), which leaves him not very much like any of them, instead of picking one thing and mastering it.