如同不能脱皮的蛇會死亡，無法改變想法的人，他們不再是明智的人。The snake which cannot cast its skin has to die. As well the minds which are prevented from changing their opinions; they cease to be mind.

The snake which cannot cast its skin has to die. As well the minds which are prevented from changing their opinions; they cease to be mind.
— Friedrich Nietzsche, Philosopher