William Manchester said this quote

The hero acts alone, without encouragement, relying solely on conviction and his own inner resources. Shame does not discourage him; neither does obloquy. Indifferent to approval, reputation, wealth, or love, he cherishes only his personal sense of honor, which he permits no one else to judge.[…] Guided by an inner gyroscope, he pursues his vision single-mindedly, undiscouraged by rejections, defeat, or even the prospect of imminent death.