道士塔 余秋雨中心内容:请教指环王电影里老萨的法力是怎么丧失的？

'I did not give you leave to go,' said Gandalf sternly. 'I have not finished. You have become a fool, Saruman, and yet pitiable. You might still have turned away from folly and evil, and have been of service. But you choose to stay and gnaw the ends of your old plots. Stay then! But I warn you. you will not easily come out again. Not unless the dark hands of the East stretch out to take you. Saruman!' he cried, and his voice grew in power and authority. 'Behold, I am not Gandalf the Grey, whom you betrayed. I am Gandalf the White, who has returned from death. You have no colour now, and I cast you from the order and from the Council.'

He raised his hand, and spoke slowly in a clear cold voice. 'Saruman, your staff is broken.' There was a crack, and the staff split asunder in Saruman's hand, and the head of it fell down at Gandalf's feet. 'Go!' said Gandalf. With a cry Saruman fell back and crawled away.

“我还没准你走，”甘道夫严厉地说：“我还没说完。萨鲁曼，你变成了一个无知的人，让人同情。你还有机会改过向善，但你竟然决定留下来，为了自己的错误而感到悔恨。那就留下来吧！但我警告你，你要出来就没有这么简单了，除非等到东方的邪恶之手过来抓你。萨鲁曼！”他的声音变得更加严厉与威严：“看清楚了，我不再是被你出卖的灰袍甘道夫。我是死而复生的白袍甘道夫。你现在什么颜色都不是了，我在此剥夺你巫师的身份和参与议会的资格！”

他高举起手，用清朗的声音大声说道：“萨鲁曼，你的手杖将断折……”喀拉一声，萨鲁曼手中的拐杖断成两截，杖头落在甘道夫的脚下。“去吧！”甘道夫说。萨鲁曼惨叫一声，狼呛地倒退离开。

上面的是原著中的文字

在甘道夫与炎魔力战身亡后,神上之神伊露维塔就给他造了个新身躯,解除了对这位次级神的一部分力量限制,同时白袍甘道夫也成为了新的巫师首领,圣白会议的执行人,要解除个把堕落巫师的力量还是小菜

不是老萨没有法力了，是干豆腐的法力比他高了（人家也升级到白袍了）。老萨最大能力在与语言魅力（就是忽悠人家照着他想的去干）还有伪装。并不是电影里拿个棍子挥来挥去那样。所以当他给困在他楼上下不来时，在玩一对百的武力游戏是很不明智的。