It is the same with the perception of colour in the supersensible world. Here we must distinguish between the colour associated with the outer object, and the inner colour-sensation in the soul. Let us call up the soul’s inner sensation when it perceives a _red_ object in the physical, outer world of the senses. Let us imagine that we retain a very vivid recollection of the impression, but that we are looking away from the object. Let us imagine what we still retain as a memory-picture of the colour, to be an inner experience. We shall then distinguish between that which is an inner experience of the colour, and the external colour itself. These inner experiences differ entirely in their content from impressions of the outer senses. They bear much more the impress of what is felt as joy and sorrow than that of normal physical sensation. Now let us imagine an inner experience of this kind arising in the soul, without any suggestion from an outer sense object. A clairvoyant may have an experience of this kind, and may know too, in that case, that it is no fancy, but the expression of a psycho-spiritual being. Now if this psycho-spiritual being excites the same impression as does a red object of the physical-sense world, then that being is red. There will, however, always be the external impression first, and then the inner experience of colour, in the case of the physical-sense object; in that of the genuine clairvoyance of a man of to-day, it _must_ be the contrary,—first the inner experience, shadowy, like a mere recollection of colour, and then a picture, growing more and more vivid. The less heed we pay to this necessary sequence of events the less we are able to distinguish between actual, spiritual perception and the delusions of fancy (illusion, hallucination, etc.).