Leo the �Great, Letter XXVIII, to Flavian (the Tome)
He took the form of a slave�without stain of sin, increasing the human and not diminishing the divine:� because that emptying of Himself whereby the Invisible made Himself visible and, Creator and�Lord�of all things though He be, wished to be a mortal, was the bending down�of pity, not the failing of power.� Accordingly He who while remaining in the form of�God�made man, was also made man in the form of a slave.� For both natures retain their own proper character without loss:� and as the form of�God�did not do away with the form of a slave, so the form of a slave did not impair the form of�God.