Behold, I stand at the door and knock. If anyone hears my voice and opens the door, I will come in to him and eat with him, and he with me.
Same chapter vs. 19 says "Those whom I love I reprove and discipline, so be zelous and repent."
For all of our condordances, books, sermons, exc. It is odd how at times we over complicate a very simple concept. It may take a man a whole life time of reading the bible to accept the free gift of salvation. Yet, at the same time it is our Lord who is knocking and saying, "Hey I'm right here just open the door." When I read this verse it it practically brings me to my knees spiritually every single time. Imagine not having food for a month. Your brother has a basket full of food and is at the door. Your bed is right on the other side of the door. All you have to do is reach over and unlock the door. So many people are starving to death in the spirit. Our Lord is the one who has the food. Many of us are sitting next to our: friend, brother, sister, exc. We could help by telling them to go answer the door. To say it plainly, God is the only one that can save them, but we can remind them that they need to eat.
May God bless you and your family on this resurrection Sunday.