The Control of Thoughts and Feelings

It must be explicitly emphasized that the colors here described are not seen as the physical eyes see colors, but that through spiritual perception the same feeling is experienced as in the case of a physical color-impression. To apprehend blue spiritually means to have a sensation similar to the one experienced when the physical eye rests on the color blue. This fact must be noted by all who intend to rise to spiritual perception. Otherwise they will expect a mere repetition of the physical in the spiritual. This could only lead to the bitterest deception.