I have also met many others who may be technically good at what they do but whose ego constantly sabotages their work. Only part of their attention is on the work they perform; the other part is on themselves. Their ego demands personal recognition and wastes energy in resentment if it doesn't get enough—and it's never enough. "Is someone else getting more recognition than me?" Or their main focus of attention is profit or power, and their work is no more than a means to that end. When work is no more than a means to an end, it cannot be of high quality.

Eckhart Tolle

from A New Earth: Awakening to Your Life's Purpose