to which we have come,
and which we are celebrating today,
has for its origin the Baptism of my Christ,
the True Light That lightens every man that comes into the world (John 1:9)
and effects my purification,
and assists that light which we received from the beginning from Him from above,
but which we darkened and confused by sin.
Therefore listen to the Voice of God, which sounds so exceeding clearly to me, who am both disciple and master of these mysteries, as would to God it may sound to you; I Am the Light of the World (John 8:12).
Therefore approach ye to Him and be enlightened, and let not your faces be ashamed, being signed with the true Light.
It is a season of new birth (John 3:3); let us be born again.
It is a time of reformation; let us receive again the first Adam.
Let us not remain what we are, but let us become what we once were.
The Light shines in darkness, in this life and in the flesh, and is chased by the darkness, but is not overtaken by it (John 1:5)—
—I mean the adverse power leaping up in its shamelessness against the visible Adam, but encountering God and being defeated—
—in order that we, putting away the darkness, may draw near to the Light, and may then become perfect Light, the children of perfect Light.
See the grace of this Day; see the power of this mystery.
[…] To us grace has been given to flee from superstitious error and to be joined to the truth and to serve the living and true God, and to rise above creation, passing by all that is subject to time and to first motion.
So let us look at and reason upon God and things divine in a manner corresponding to this Grace given us.
But let us begin our discussion of them from the most fitting point. And the most fitting is, as Solomon laid down for us; us; The beginning of wisdom, he says, is to get wisdom (Proverbs 4:7).
And what this is he tells us; the beginning of wisdom is fear.
For we must not begin with contemplation and leave off with fear (for an unbridled contemplation would perhaps push us over a precipice), but we must be grounded and purified and so to say made light by fear, and thus be raised to the height.
For where fear is there is keeping of commandments;
and where there is keeping of commandments there is purifying of the flesh, that cloud which covers the soul and suffers it not to see the Divine Ray.
And where there is purifying there is Illumination;
and Illumination is the satisfying of desire to those who long for the greatest things, or the Greatest Thing, or That Which surpasses all greatness.
Gregory Nazianzen (c.330-390): Oration 39 (On the Holy Lights), 1, 2, 8.