I love the sentiment behind verse 20, Here I am! I stand at the door and knock. If anyone hears my voice and opens the door, I will come in and eat with him, and he with me. This verse is important at any level of relationship with Christ. Whether you are someone who has never accepted Him or are a long time believer, Jesus does all the work. He is the one who comes to us and knocks on our door. He is the one to seek us out. It is simply our job to let Him into our lives and make ourselves available to build a relationship with Him.