an analogy for thinking about Christmas

St. Augustine explains a little about what Christians mean when they celebrate Christmas:

"'The word was made flesh and lived among us' [John 1:14] When we speak, the word which we hold in our mind becomes a sound in order that what we have in our mind may pass through ears of flesh into the listener's mind: this is called speech. Our thought, however, is not converted into the same sound, but remains intact in its own home, suffering no diminution from its change as it takes on the form of a word in order to make its way into the ears. In the same way the Word of God became flesh in order to live in us but was unchanged."