In your philosophy Horatio
In the American Heritage Dictionary one definition of philosophy is “The critical analysis of fundamental assumptions or beliefs.” The tarot is a symbol system of some antiquity and one that encodes Western “fundamental assumptions” and “beliefs” about the nature of reality. Thus it is a valid subject of philosophical enquiry. With regard to the tarot and its truth value…all I am willing to say about this topic is that it represents what hundreds of years of religious and spiritual seekers/thinkers feel is true about the human world. Using Jung’s terminology, it is a representation of the collective unconscious of the western mind.
The tarot is a book of psychology—of ethical philosophy. As such it is a guide to behavior. Figuring out what part of the story you inhabit can tell you what is the most appropriate set of behaviors for the circumstances in which you find yourself.
Fundamentally the tarot accepts that life is generally unknowable. That is why the tarot exists, to shed a small amount of light on the particular ground upon which you stand, because you cannot know what will happen too far ahead. Too much depends on other humans. Much too much depends on the non-human world. At best, you can try to understand what drives you and what the world is like in which you live. This acceptance of fundamental human vulnerability and limitation, the acceptance that we are operating in a vastly powerful world most of which simply is beyond us, and certainly not built for us, is the core of the difference between a world view oriented to the tarot stories and a world view oriented toward the “apocalyptic.”
Finally, the tarot takes no position about the universe as a whole. It is the story of the human universe. It focuses on what we do, what we need, and the places where we impinge upon the rest of the universe.
By the way, although the Thoth deck does use the symbol system inherent in astrology as part of the overall symbolic language of the cards, astrology is the study of planetary patterns and how they can be used to explain human predilections and behaviors. This is not the same thing as tarot—just as ontology and epistemology, although allied, are not the same study.