"For people do not gather figs from thorns or from thorn trees, if they are wise, nor grapes from thistles. For, on the one hand, that which is always becoming is in that from which it is, being from what is not good, which becomes destruction for it and death. But that which comes to be in the Eternal One is in the One of the life and the immortality of the life which they resemble."
-The Apocalypse of Peter
http://www.gnosis.org/naghamm/apopet.html