"Envy may justly be called "the gall of bitterness and bond of iniquity;" it is the most acid fruit that grows on the stock of sin, a fluid so subtle that nothing but the fire of divine love can purge it from the soul."

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We are, in a way, temporary ambulatory repositories for our nucleic acids. This does not deny our humanity; it does not prevent us from pursuing the good, the true and the beautiful. But it would be a great mistake to ignore where we have come from in our attempt to determine where we are going.

— Carl Sagan