The line is from Exodus ... I'm on my way out the door, or else I'd drudge up the exact verse #. The line has the potential to relate to the definition of human life in that the termination of the pregnancy does not demand a "life for a life." I say "potential" because, like most of the good book, you can find lines in the bible that will provide a flimsy pretext to support just about everything. Although I'm afraid nothing in the bible is quite as flimsy as using speculative science fiction as a way of framing a discussion on homosexuality.