A little boy who had been to Sunday School told his father that he learned that God the Father and Son were equal. The father said: “That is ridiculous. I am your father; you are my son. I existed a long time before you.” “No,” said the boy, “you did not begin to be a father until I began to be a son.”
At Christmas, He Who was eternally generated by the Father is generated in time, in the womb of a virgin Mary. The Son of God then becomes the Son of Man. As the word which I speak to you is not different because I give it breath and sound, so neither is the Word of the Son of God changed because He takes on a human nature like ours in all things except sin, “The Word became flesh and dwelt amongst us.”   - Archbishop Fulton Sheen – (Bishop Sheen Writes)