Dharma Worker, Pierre Chang (From Orientation videos) and others in “Because You Left”

There's an open chamber about twenty meters in behind the rock. There's something in there. And the only way to get it is to lay charges here and here, blast through it-

Under no circumstances. This station is being built here because it's proximity to what we believe to be an almost limitless energy and that energy, once we can harness it correctly, it's going to allow us to manipulate time.

Right... Okay, so what? We're gonna go back and kill Hitler?

Don't be absurd. There are rules. Rules that can't be broken.

So what do you want me to do?

You're gonna do nothing. If you drill even one centimeter further, you risk releasing that energy. If that would've happened... God help us all.