St. John Climacus ca. 7th century
We shall never cease to advance in love, either in the present or in the future life, continually adding light to light. And however strange what I say will seem to many, nevertheless it shall be said. According to the testimonies we have given, I would say that even the spiritual beings (i.e. the angels) do not lack in progress; on the contrary, they will ever receive more and more glory, more and more knowledge. (The Divine Ladder: Step 26. cited from Cavarnos “The Future Life According to Orthodox Teaching” pg. 46)
