13 But why do I speak of men, since of the beings whom all nations have deemed divine, none has appeared on earth with power like to his? If there has, let the fact now be proved. Come forward, you philosophers, and tell us what god or hero has yet been known to fame, who has delivered the doctrines of eternal life and a heavenly kingdom as he has done who is our Saviour? Who, like him, has persuaded multitudes throughout the world to pursue the principles of Divine wisdom, to fix their hope on heaven itself, and look forward to the mansions there reserved for them that love God? What god or hero in human form has ever held his course from the rising to the setting sun, a course co-extensive as it were with the solar light, and irradiated mankind with the bright and glorious beams of his doctrine, causing each nation of the earth to render united worship to the One true God? What god or hero yet, as he has done, has set aside all gods and heroes among civilized or barbarous nations; has ordained that divine honors should be withheld from all, and claimed obedience to that command: and then, though singly conflicting with the power of all, has utterly destroyed the opposing hosts; victorious over the gods and heroes of every age, and causing himself alone, in every region of the habitable world, to be acknowledged by all people as the only Son of God?
14. Who else has commanded the nations inhabiting the continents and islands of this mighty globe to assemble weekly on the Lord's day, and to observe it as a festival, not indeed for the pampering of the body, but for the invigoration of the soul by instruction in Divine truth? What god or hero, exposed, as our Saviour was, to so sore a conflict, has raised the trophy of victory over every foe? For they indeed, from first to last, unceasingly assailed his doctrine and his people: but he who is invisible, by the exercise of a secret power, has raised his servants and the sacred houses of their worship to the height of glory.
But why should we still vainly aim at detailing those Divine proofs of our Saviour's power which no language can worthily express; which need indeed no words of ours, but themselves appeal in loudest tones to those whose mental ears are open to the truth? Surely it is a strange, a wondrous fact, unparalleled in the annals of human life; that the blessings we have described should be accorded to our mortal race, and that he who is in truth the only, the eternal Son of God, should thus be visible on earth.
Source: Oration in Praise of Constantine (New Advent)