Could you elaborate on this statement?
How do you define "playing God"?
What did God "never intend us [humans] to do"?
Redefining "the very nature of what it means to be human", as per your introductory comments.
What did God "never intend us [humans] to do"?
I never said there was any such thing. I was just making a contrast between the developments that Kurzweil is talking about, and what people said about previous technological developments. They're of a fundamentally different nature from each other.