St. Gregory of Nyssa on the Incarnation

From his Great Catechism:

"It is the peculiar property of the essence of fire to tend upwards; no one therefore, deems it wonderful in the case of flame to see that natural operation. But should the flame be seen to stream downwards, like heavy bodies, such a fact would be regarded as a miracle; namely, how fire still remains fire, and yet, by this change of direction in its motion, passes out of its nature by being borne downward. In like manner, it is not the vastness of the heavens, and the bright shining of its constellations, and the order of the universe and the unbroken administration over all existence that so manifestly displays the transcendent power of the Deity, as this condescension to the weakness of our nature; the way, in fact, in which sublimity, existing in lowliness, is actually seen in lowliness, and yet descends not from its height, and in which Deity, entwined as it is with the nature of man, becomes this, and yet still is that."