Jesus is asking us today - to let him in as well. The scripture says He is standing at the door, knocking and that if anyone "opens the door" - He will come in. (His Holy Spirit that is) When you do, you will have the power of God within you for guidance and comfort. You may have fears or doubts about that too. But I wouldn't want to be "wandering around" in the world today without the Lord's guidance!
Why not let God give you the "Christmas present" He intended for you..... welcome Jesus into your heart.