Rev. 3:20 - Though this verse has been used in countless tracts and evangelistic messages to depict Christ’s knocking on the door of the sinner’s heart, it is broader than that - John Macarthur

Rev. 3:20 Behold, I stand at the door and knock; if anyone hears My voice and opens the door, I will come in to him and will dine with him, and he with Me.

Though this verse has been used in countless tracts and evangelistic messages to depict Christ’s knocking on the door of the sinner’s heart, it is broader than that. The door on which Christ is knocking is not the door to a single human heart, but to the Laodicean church. Christ was outside this apostate church and wanted to come in—something that could only happen if the people repented.

The invitation is, first of all, a personal one, since salvation is individual. But He is knocking on the door of the church, calling the many to saving faith, so that He may enter the church. If one person (anyone) opened the door by repentance and faith, Christ would enter that church through that individual. The picture of Christ outside the Laodicean church seeking entrance strongly implies that, unlike Sardis, there were no believers there at all.

Christ’s offer to dine with the repentant church speaks of fellowship, communion, and intimacy. Sharing a meal in ancient times symbolized the union of people in loving fellowship. Believers will dine with Christ at the marriage supper of the Lamb (Revelation 19:9), and in the millennial kingdom (Luke 22:16, 29-30). Dine is from deipneō, which refers to the evening meal, the last meal of the day. The Lord Jesus Christ urged them to repent and have fellowship with Him before the night of judgment fell and it was too late forever

John MacArthur

- The MacArthur New Testament Commentary: Revelation 1-11 p140