"He gave His Only-begotten Son," not a servant, not an Angel, not an Archangel. And yet no one would show such anxiety for his own child, as God did for His ungrateful servants ... He who giveth life to others, much more to Himself doth He well forth life ... For He calls the Cross the fountain of life; which reason cannot easily allow, as the heathens now by their mocking testify. But faith which goes beyond the weakness of reasoning, may easily receive and retain it.
-St. John Chrysostom, Homily 27 on John 3, 4th Century