Give Him my heart...?

Gratitude Journal
1. Happy Birthday to Beth
(I won't tell her age, but we have been married a long time!)
2. P.I. Christmas Party
(Different this year - change is good!)
3. The difference one candle can make in a dark room.
4. Reconnecting with old friends on Facebook!
5. Even the 'suggestion' that snow might make it to Columbus...

What can I give Him - I will give Him my heart.

While I don't know the whole hymn I do love the words (above), particularly when sung during the ADVENT Season. However, my challenge is to pull apart the term - 'give Him my heart'. What does that exactly mean?

Are we talking about some sentiment or emotion? No - my emotions change too often. They are not under my will power as I would like. They are too erratic!
Maybe our thoughts - that's it, I won't think of anything but Jesus... No, that doesn't seem to work either. My mind drifts and it is always changing according to the topic.

What does it mean then to give Him my heart? Christmas is coming...