The deepest purpose of astrology should allow us to see the Maya or illusion that runs through our mind and blocks us from seeing our own Divinity. Astrology should reveal our hidden patterns and not just affirm what we know about our self already. It is our hidden patterns and blind spots which get us into the most trouble and cause us the most suffering. It takes courage to look at them, bring them into the light and transforms them but that is why we are on the planet.