That's their intuition. While it helped lead people away from relying on intuition in ancient times, today astrology serves to take us back to basics. A psychic reader can focus a caller on the aspects of a horoscope or a tarot spread. From that point of focus, they can bring out what is known. Callers often answer their own questions.
Readers provide answers by listening to what they hear spoken and to what their intuition says.
It's always been about communication based on applying feelings to thoughts, instead of the other way around. Experts wonder whether the mentally retarded or dyslexic actually have more in common with the fine-tuned intuitive skills of ancient peoples. But there are well-documented cases of savants who have uncanny abilities with numeric symbols, the stuff that evolved from astrology and measuring star movements. No one raised in a typical American home can think as intuitively as the ancients, no matter how much they've learned through words about the symbols of stars, moons or lucky clovers. Words, alphabetic symbols and meanings, are at the root of every thought, whether spoken or not.