For me, the whole idea of image involves light, photons, light particles and waves etc. I begin there.
For some, Jesus represents the intermediating consciousness between the genuinely inconceivable oneness and the human. For others its Krishna, god in human form. Yogananda promoted the idea of a personal god in order to be able to come to terms with it. There is an idea that when pure spirit speaks to the human mind it has to use concepts, words and images which are already in that mind.
Of course, Richard Dawkins would tell us something else entirely. He was very funny on Bill Maher this past week.
DS