"Behold, I stand at the door and knock: If any man hear my voice, and open the door, I will come in unto him, and sup with him, and he with me." - Revelation 3:20 (Audio)
The following sermons are on Revelation 3:20:
Open the Door to Your Heart, by Pastor John Reisinger
Christ Knocking at the Door, by Rev. Stephen Hamilton
Knocking at the Door, by Dr. David P. Murray
Answer the Door, by Dr. Ian R. K. Paisley (1834-1892)
Knock, Knock, by Rev. Ian Brown