Max Lucado compares Mary's acceptance of God at his Word, including accepting the the Word of God was made flesh in her womb. That same Word, Jesus Christ wants to dwell fully in us. Here is how Max explains it:
Like Mary, you and I are indwelt by Christ.
Find that hard to believe? How much more did Mary? No one was more surprised by this miracle than she was. And no one more passive than she was. God did everything. Mary didn't volunteer to help. What did she have to offer? She offered no assistance.
And she offered no resistance. Instead she said, "Behold, the bond- slave of the Lord; may it be done to me according to your word" (Luke 1:38).
Unlike Mary, we tend to assist God, assuming our part is as important as his. Or we resist, thinking we are too bad or too busy. Yet when we assist or resist, we miss God's great grace. We miss out on the reason we were placed on earth-to be so pregnant with heaven's child that he lives through us. To be so full of him that we could say with Paul, "It is no longer I who live, but Christ lives in me." (Gal. 2:20)
What would that be like? To have a child within is a miracle, but to have Christ within?
To have my voice, but him speaking.
My steps, but Christ leading.
My heart, but his love beating
in me, through me, with me.
What's it like to have Christ on the inside?
So much him, so little me
That in my eyes it's him they see.
What's it like to a Mary be?
No longer I, but Christ in me.
From Next Door Savior
Copyright (Thomas Nelson, 2003) Max Lucado
You can visit Max at his web site here.