The mutable signs are the Wisdom-aspect of the elements, because each mutable is the ninth sign from its initial cardinal. Your ruling planet is the significator of the focusing, and expressing the vibration of your Ascendant-sign and its Principle, represents a basic function that you are to fulfill in this incarnation. The environmental requirement for the unfoldment and fulfillment of your personality-potentials is shown by the house in which your planetary ruler is placed. No matter where we go on this plane, we carry our entire horoscope with us, inside ourselves, for the simple reason that the horoscope is the picture of our consciousness and we can never get away from consciousness. We can, however, keep ourselves established in the requirements of our planetary ruler if we will perceive that any place or association with any group of people contains possibilities for exercising the potentials of the planetary ruler.
Man is to utilize the physical plane.
This is the essential picture of the residue of unfulfilled ideals which made necessary the present incarnation. To know only the worst of our parents is, in human terms, to become most intensely aware of the worst in ourselves because we incarnated through them by the Laws of Cause and Effect and of Vibratory Sympathy. Unless there is the complication of interceptions in certain arrangements, the signs on the twelfth and fourth houses will represent two aspects of one of the four elemental trines. This is the picturing of the wisdom resource from the last time you incarnated in the physical sex opposite to your present expression. So, we see that the fourth house of the natal horoscope contains so much information concerning the best of ourselves translated from the past into the present.