"Contemplation," in Christian spirituality, is revelatory closeness with God. In contemplation one beholds the beauty of the Lord. The contemplative place is a loving union with God; a unity of love (note: not a metaphysical unity of being, even though certain Christian contemplatives come close to asserting that).
When we dwell in Christ so close that it can be described as a unitive condition, then "change" and meta-morphe (Romans 12:2) is the norm. Within one's heart the creative work of God is happening. One cannot consistently dwell in the preence of God and remain unchanged or, in Merton's language, uncreated.