"Man's ego is the fountainhead of human progress."
FYI: the rock band "Collective Soul" took their name from a term in part 4, chapter 11 of The Fountainhead. I guess rock stars do read...lol
One one hand it is man's ego and on the other hand it is hardwork, dedication and aiming at perfection - through trials and tribulations of life. It is a lovely book and every youth should read it.