This sermon explores the profound meaning of Revelation 3:20, addressing a debate on its interpretation and extending its application beyond conversion to the fervent love and fellowship Jesus desires with each believer. It challenges the notion that Christ's knocking at the door is solely an invitation to non-believers, emphasising also His call to believers to rekindle their first love and commit to a deeper relationship with Him. By juxtaposing this with references to the Song of Solomon, the preacher illuminates the mutual love between Christ and the believer, advocating for a personal response to Jesus' gentle but persistent invitation. This call to both conversion for non-believers and renewal for the lukewarm believer underscores the sermon's core message: Jesus seeks a passionate, loving relationship with each of us, inviting us personally to open the door to a more profound fellowship with Him.