电影指环王中甘道夫在石门前对弗罗多说的那句话是什么

你问的是在Durin大门前Gandalf对Frodo说的话，但实际上这段并没有任何名言，无非是怎么开门，Gandalf说了点咒语但是不管用之类的话。也许是你记错了，其实Gandalf很经典的一段话是在Moria迷路之后对Frodo说的，时间就在你说的这段大概十分钟之后。
注意下面这段对话，最后一句话大概就是你要的，不过为了内容连贯我还是全部贴出来吧。

Frodo: It's a pity Bilbo didn't kill him when he had the chance.

Gandalf: Pity? It was pity that stayed Bilbo's hand. Many that live deserve death, and some that die deserve life. Can you give it to them, Frodo? Do not be too eager to deal out death and judgment. Even the very wise cannot see all ends. My heart tells me that Gollum has some part to play yet, for good or ill, before this is over. The pity of Bilbo may rule the fate of many.

(Gollum backs off. Frodo sits down next to Gandalf with a sigh)

Frodo: I wish the Ring had never come to me. I wish none of this had happened.

Gandalf: So do all who live to see such times, but that is not for them to decide. All we have to decide is what to do with the time that is given to us...