According to George Bernard Shaw, a reasonable man adapts himself to the conditions that surround him while an unreasonable man adapts the surrounding conditions to himself. A person’s success is thus a product of whether he is Master of Circumstances (MC) or a Victim of Circumstances (VC).
original Shaw quote:
Reasonable people adapt themselves to the world. Unreasonable people attempt to adapt the world to themselves. All progress, therefore, depends on unreasonable people.