The things that have come into being have received from the Creator their proper place, their beginning and, in some cases, their end. But there is no boundary to virtue. The psalmist says, 'I have seen the end the end of all perfection, but Your commandment is very broad and is without limit' (Ps. 118:96). Now if it is true...that love never fails (I Cor. 13:8),... then love has no boundary, and both in the present age and in the future age we will never cease to progress in it, as we add light to light.
-St. John Climacus, Ladder of Divine Ascent, Step 26: On Discernment; Paulist Press pgs. 250-251, 6th century