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—… - David Gerrold

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 not master.
Love.

Whatever our purpose, we probably aren't fulfilling it. We're not functioning as we should.
He shrugged at her. "How should we function?"
"Like human beings." She said it righteously.
"Isn't that what the human race is already doing? Functioning like human beings—squabbling with each other, killing each other, hating...?"
"That's not human."
"Oh, but it is. It's very human."
"Well, it's not what human should be."
"Now that's a different story. You're not talking about what people are, but what you want them to be."
"Well, maybe we should be what we aren't because what we are now isn't good enough. Maybe we should be dismantled."
"I don't think we have to worry too much about somebody up there doing it—we're doing it ourselves."

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.