Since we believe that Christ is God, he must have existed for all time. Without a beginning how could he have been begotten?
I wish I could make a simple, lucid explanation of who God is and how he exists so that you would or could say, “Ah! Now I see! It’s so plain and obvious.” But that cannot be. We are always limited creatures trying to understand an infinite God—a being far beyond our comprehension and intelligence. In speaking of Jesus we must always remember we are talking about the second person of the Blessed Trinity—God the Son—become incarnate. In Jesus, the Son, are united two natures: the divine and human. The divine person possesses two natures.