Psa. 2:7 ¶ I will tell of the decree:
The LORD said to me, “You are my Son;
today I have begotten you.
Do you like a good mystery? There is something about the unknown that calls for our attention. Especially the mystery David spoke about in today’s verse. This is literally the greatest of all mysteries; the mystery of deity and humanity, the hard to believe story of the redemption of fallen man. How could Jesus live from eternity? We know He became a man through the virgin birth through Mary. That’s not what today’s verse is talking about. This scripture is talking about something way before Mary or Bethlehem, this is talking about the only begotten Son of God. You see Jesus became a son of man, He has aways been the Son of God. This whole concept of begetting is speaking of something that predates creation and predates time itself. Christ is the eternally begotten Son of God. Here is how Martin Luther describes this mystery.
“But is it enough to know this about the King? By no means. He is also the Son of God, begotten from eternity. This could not be discerned with the eyes, so the King Himself teaches it. It is a matter of faith. In order not to distort the text, one must weigh the words: “You are My Son, today I have begotten You.” God is outside time, a spiritual being. Therefore He cannot beget something temporal, something physical, but brings forth something like Himself, that is, eternal and spiritual. Since He speaks these words to that person set on Zion, however, that He should be a king in a physical and visible place, what follows from this? Is it not this, that this man born in time of the Virgin Mary existed before He was conceived in Mary’s womb by the Holy Spirit, indeed from eternity? For ‘today’ in the case of God, has no beginning and no end. Thus the present text joins together the divine and the human so that they are one, so that you may correctly say: This man is God.”
The Apostle John wrote about this in his gospel.
John 1:14 And the Word became flesh, and dwelt among us, and we saw His glory, glory as of the only begotten from the Father, full of grace and truth.
John 1:18 No one has seen God at any time; the only begotten God who is in the bosom of the Father, He has explained Him.
This mystery is beyond comprehension. Think about it, the Father and Son have always existed, they have always had this relationship of love, we are just now being brought into it.