Here’s an example with The Light of the World, by William Homan Hunt (1851-56). This picture not only hangs in Manchester Art Gallery but it also at Keble College Oxford and St Paul’s Cathedral. So which is the real one or all three equally authentic? The St Paul’s canvas was painted nearly fifty years later, with the assistance of Edward Robert Hughes. The Manchester version might be by his pupil Fred Stephens.

In the painting Christ is knocking at the door, i.e. the human soul, an idea taken from Revelation 3:20.

“Behold I stand at the door and knock. If any man hear My voice, and open the door, I will come in to him, and will sup with him, and he with Me.”