OLIVIER CLÉMENT, The Roots of Christian Mysticism; Part 3, Approaches to Contemplation
Every Christian, even if he lacks any education, knows that every place is a part of the universe and that the universe itself is the temple of God. He prays in every place with the eyes of his senses closed and those of his soul awake, and in this way he transcends the whole world. He does not stop at the vault of heaven but reaches the heights above it, and, as though out of this world altogether, he offers his prayer to God, led by God's Spirit.
ORIGEN Against Celsus, 7,44