Ps.2:7 – “I will declare the decree:
The LORD has said to Me,
‘You are My Son,
Today I have begotten You”.
This verse touches on one of the mysteries of the Trinity. The Father speaks of His Son and says “today I have begotten you”. This takes us into holy, impossible to comprehend territory. First, it describes the difference between Jesus and us. We are called sons of God but there is a huge difference. We are created by God, not begotten. Begotten means to father. Jesus is uncreated – He is eternally begotten by the Father. We are formed from the dust of the earth – Jesus comes forth from the Father sharing His essence. We come from the earth and have received the Spirit of adoption. Secondly, this points us to the eternal nature of the Son of God. We are part of the creation- we came into being at His command. Christ has existed with His Father before time was created. He inhabits eternity as the Son of God. Here is how Spurgeon looks at this holy mystery.
“Here is a noble proof of the glorious Divinity of our Immanuel. “For unto which of the angels said he at any time, Thou art my Son, this day have I begotten thee?” What a mercy to have a Divine Redeemer in whom to rest our confidence! “This day have I begotten thee.” If this refers to the Godhead of our Lord, let us not attempt to fathom it, for it is a great truth, a truth reverently to be received, but not irreverently to be scanned. It may be added, that if this relates to the Begotten One in his human nature, we must here also rejoice in the mystery, but not attempt to violate its sanctity by intrusive prying into the secrets of the Eternal God. The things which are revealed are enough, without venturing into vain speculations. In attempting to define the Trinity, or unveil the essence of Divinity, many men have lost themselves: here great ships have foundered. What have we to do in such a sea with our frail skiffs?”
His eternal existence gives us incredible hope. Jesus not only has existed from before time – He will live as the Son for eternity. He is my eternal high priest. He is my means of approaching God now and also for forever. 2000 years ago He took on a human body but He has been the only begotten from eternity.