That was the true Light, that lights every man that comes into the world.
All Commentaries on John 1:9 Go To John 1
Theophylact of Ochrid
AD 1107
The Evangelist is about to speak of the divine economy of the Incarnation of the Only-begotten, Who came unto His own and became flesh. So that no one would think that the Word did not exist before He took flesh, the Evangelist leads our mind upwards to that existence which is beyond every beginning, and says, "He was, even before He took flesh, the true Light." By this means he refutes the heresy of Photinus and Paul of Samosata, who taught that the Word began to exist when He was born of Mary, and before this, was not. And you also, O Arian, who say that the Son of God is not true God, listen to what the Evangelist calls Him: the true Light. And you, O Manichee, who say that we are the creations of an evil demiurge, listen: the true Light …enlighteneth every man. If the evil demiurge is darkness, how could he enlighten anyone? Therefore, we are the creations of the true Light. How, you might ask, can He enlighten every man, when we see some who are in darkness? As far as it is His part to do, He enlightens all. Tell me, are we not all endowed with reason? Do we not all by nature know right from wrong? Do we not all have the power to comprehend the Creator from His creation? Therefore, the logos which has been given to us, which teaches us by nature and which is also called the natural law, may be called "light" which is given to us by God. If some make poor use of this logos, they darken themselves. But some have answered the question in this manner: the Lord enlighteneth every man that cometh into the world. That is to say, He enlightens those who have come to a better condition, and who strive to put in order and adorn their own soul and not to leave it disordered and ugly.