Astrology is the result of thousands of years of accumulated experience and observation. Some people believe it is a form of statistics. But because the variables at any "time" are very large, it is necessary to also employ physiognomy (face- and palm-reading).
命理天象是古人數千年來觀察和經驗的累積，有人甚至以之為最精密的統計學，而「時間」在其中的變數極大，牽涉亦廣，要同時配合其它面相、手相等來觀察。