C. S. Lewis[17] likened it to a book that is lying on top of another. We say the top book owes its position to the bottom one. It wouldn’t be where it is without the one on the bottom. Now, if you can, imagine this relationship as always having been. There never was a time when the top book was not where it was, never a time when the bottom book was alone. This is what we mean when we speak of the Father begetting the Son.
