This passage is often thought of as a picture of Jesus standing at the heart's door of a non-believer asking to be allowed inside. But the context tells us that Jesus is standing at the heart’s door of Laodician Christians who have turned lukewarm in their faith. What causes a Christian to become lukewarm and lose their fervent attitude toward Christ and even refuse to invite him into parts of their life (to share a gracious meal with him) when he knocks on their door?