One of the biggest challenges to practitioners of traditional sciences, such as astrology, is that of setting aside the prejudices that have been instilled in us from modern education. One of the prejudices is a pervasive form of arrogance, which can be summarized by the formula: “Primitive people believed ……., but now we know…….” When metaphysical principles are taught at all, they are taught from this perspective.
Here is an example of this type of teaching from Grout’s History of Western Music (3rd Edition)
For some Greek thinkers music also had a close connection with astronomy, not only through the identity of mathematical laws that were thought to underlie both the system of musical intervals and the system of the heavenly bodies, but also through a particular correspondence of certain modes and even certain notes with the various planets. Such magical connotations and extensions of music were common among all Eastern peoples. The idea was given poetic form by Plato in the beautiful myth of the “music of the spheres”; it is echoed by writers on music throughout the Middle Ages, and appears also in Shakespeare and Milton. Ptolemy, one of the most important of the ancient writers on music, was also the leading astronomer of antiquity–as, in our own day, many of the best amateurs of music are physical scientists.
Now, at first, one may not think that this statement is too bad, but, as it turned out it was the only reference to the metaphysics of music in one of the more important textbooks for the study of music theory.
Another such example is the modern interpretation of Egyptian mummification practices. During the mummification process, the heart was careful preserved intact in the body and the brain was discarded as unimportant. The modern interpretation of this is that the Egyptians did not understand anatomy, and they did not know what the brain did. From even a pragmatic standpoint, this condescending interpretation is contrary to the available data. The fact that mummies thousands of years old are available to us to study should be enough to convince us that this culture had a very sophisticated understanding of the human body. If we let go of the prejudice that has been instilled in us, we can start to really think about what the Egyptians may have been doing.
Unlike the modern perspective, from a traditionalist perspective, it is axiomatic that our forebears were our superiors, and that they knew more than we do now. So rather than presuming that the Egyptians did not know what they were doing, the presumption changes to being that they knew and understood something that we have lost. As it turns out, from a metaphysical standpoint, this practice is quite fascinating, and is instructive to us in re-educating ourselves to understanding traditional science.
The starting point for this analysis is that the Egyptians carefully preserved the heart. 
While modern Western society associates the heart with love, specifically romantic love, traditionally, the Heart was always Solar. From a traditionalist perspective, Solar does not refer to the physical Sun, but to the Solar principle (although the physical Sun is the cosmic representation of the Solar principle). The Solar principle is the Creative Aspect of the Divine, or the Mother principle. The Solar principle in humans, as microcosms of the cosmos, is that part of us which is always connected to and even One with the Divine.
Traditionalists speak of the Solar Intellect, which is the part inside of us that understands all things. In this day and age in the West, we have lost our understanding of the Solar Intellect, but the concept is still present in Eastern thought.
Just as the physical Moon reflects the light of the physical Sun, the Lunar principle is a reflection of the Solar principle. The Lunar principle governs all physicality. The Lunar principle also represents our individual souls. The reflection of Solar Intellect is Lunar Reason. Lunar Reason is how we process information on the material plane. We also use Lunar Reason to process information we receive from our senses and to intuit matters that lie beyond our senses. We also use Lunar Reason to make inferences and to synthesize information into a usable form.
In modern times, we tend to believe that the information we receive from our senses is the most reliable information; however, this was not the case in the Ancient world. Although, the brain or head being governed by the Lunar principle is not nearly as universal as the heart being governed by the Solar principle, the anatomical function of the brain almost directly corresponds with the concept of Lunar Reason. Interestingly enough, there has been research that has shown that recipients of heart transplants take on the characteristics of the heart donor, so it is possible that the heart may have an anatomical function that is congruent with its metaphysical function.
So, if we were to presume that the Egyptians knew exactly what they were doing, this becomes quite instructive to us. The Egyptians careful preserved the heart, which symbolically represents the Solar Principle. They discarded the brain, which is the anatomical seat of Lunar Reason. This would mean that they believed that in the afterlife, we would need our Solar Intellect, but that we would no longer need our Lunar Reason. From a Traditionalist perspective, this is exactly right. Lunar Reason is necessary for us in the world of flux and change, but the Solar Intellect is what survives and what is eternal. Lunar Reason is also necessarily subordinate to Solar Intellect.
This is a huge change in the schema most of us were raised with. We have been taught that the sense-data plus Lunar Reason are all that exists and that all we can be sure of is what we can process with our senses or derive from our senses. The Traditionalist perspective is exactly the opposite. The symbolic and the metaphysical is what we can be sure of. The information we receive from our senses is transitory, part of the world of flux and change. In other words, from the perspective of the Eternal, our Hearts are of primary importance, but our brain is only important from the perspective of our physical, material existence.
The Wisdom of Our Grandmothers 