Perhaps my understanding is misguided, however. Clearly, I understand the idea that that which is intangible cannot be seen from a sensual (senses) aspect. In other words, the face of God, nor a man's soul cannot be accurately described in physical terms. I also understand, from the first philosophers POV, that feelings and emotions are "fantastic". That is, based in fantasy. In other words, whether derived from experience or environment, our mental reactions, even our personal bias of memory, are dependent solely on the individual and his or her spiritual convictions. i.e. Buddhists think of Karma, Christians think of sin.
But perhaps you could explain why astrology is relevant to this argument?