And the Word was made flesh, and dwelt among us, (and we beheld his glory, the glory as of the only begotten of the Father,) full of grace and truth. John 1:14 KJV
Jesus declared Himself to be “the way, the truth, and the life.”
To know how to get somewhere you must know (be familiar with) the way to get there.
To really be free (spirit, soul, and body) you must know Him who is Truth as revealed in the Word of Truth (The Bible).
To really enjoy a fruitful and fulfilling life of purpose you must know Him who is the Life.
This is possible due to the fact that God sent His Son, Jesus, the Messiah of Israel and Savior of the world.
This is the joy and glory of the Christmas Celebration.