Not that he was jealous of the machine—but it was reassuring to know that there was still something that human beings could do that machines could no… - David Gerrold

Don’t push the on-button if you don’t know where the off-button is.

You aren’t really jumping through time, that’s the illusion; what you’re actually doing is leaving one timestream and jumping to—maybe even creating—another. The second one is identical to the one you just left, including all of the changes you made in it—up to the instant of your appearance. At that moment, simply by the fact of your existence in it, the second timestream becomes a different timestream. You are the difference.

I wish I could change it all. I wish I could.
But I can’t.
Dammit.
Now I know what it’s like to have an indelible past—one that can’t be erased and changed at will. It’s frustrating. It’s maddening. And it makes me wish I had been more careful and thoughtful.