"The command "Be ye prfect" is not idealistic gas. Nor is it a command to do the impossible. He said (in the Bible) that we were "gods" and he is going to make good his words. He will make us into a god or goddess, a dazzling, radiant, immortal creature...a bright stainless mirror which reflects back to God perfectly."

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The energy requirements for interstellar travel are so great that it is inconceivable to me that any creatures piloting their ships across the vast depths of space would do so only in order to play games with us over a period of decades. If they want to make contact, they would make contact; if not, they would save their energy and go elsewhere.

— Isaac Asimov