A lot of you seem to be missing the point of this exercise, which is to emphasize the biggest hurdle in NT personal development--finding what value the real world and emotions has to offer you.
Because the NT temperament thinks abstractly without concrete or emotional checks and balances, it tends to self-inflict the very state of ignorance it initially sought to avoid. It is those with the deepest desire for truth who will bite into the hook of false knowledge the hardest (SW anyone?) Behind a wall of intellectuality, self-enabling thoughts are allowed to fester and the NT slips further away from the actual truth. As they lose their grasp, pride develops to protect the ego.
The end result is ironic, especially if the NT sees them self as a pedagogue, as others assume competence is the explanation for the intellectually haughtiness and develop misplaced trust in the false ego. They start to replace their accurate (albeit humble) knowledge for lofty theories (perhaps even mimicking them, imitation is the sincerest form of flattery after all) and the ignorance spreads. This also serves to bolster the NT confidence and usually sealing their fate.
I don't really care how you define success, but attempting to do so in a concrete manner is the first step towards overcoming the vicious cycle of intellectual masturbation and the ignorance it induces. By becoming more receptive to their concrete and emotional nature, the NT becomes a more balanced individual overall, ultimately fueling a greater degree of success through their preferred means.