Philo Judaeus De Abrahamo 119

This then is sufficient to say by way of a literal explanation of this account; we must now speak of that which may be given if the story be looked at as figurative and symbolical. The things which are expressed by the voice are the signs of those things which are conceived in the mind alone; when, therefore, the soul is shone upon by God as if at noonday, and when it is wholly and entirely filled with that light which is appreciable only by the intellect, and by being wholly surrounded with its brilliancy is free from all shade or darkness, it then perceives a threefold image of one subject, one image of the living God, and others of the . other two, as if they were shadows irradiated by it. And some such thing as this happens to those who dwell in that light which is perceptible by the outward senses, for whether people are standing still or in motion, there is often a double shadow falling from them.