“. . . And the Word became flesh and dwelt among us, and we beheld His glory as of the only begotten of the Father, full of grace and truth.” John 1
An excellent devotion for Advent, is Athanasius On The Incarnation.
C. S. Lewis wrote the Preface for this edition(Link), advising us to not read another new book until we have read an old one. And if we have not time for both, to read the old.