Astrological Natal interpretation is a provocative and challenging exercise because in modern times the depth of meaning in the world’s commonwealth of symbols has both expanded and diluted since classical Greek and Indian eras when the understanding of techniques used even today were first used. The fatalistic prognostication used before the idea of "free will" was put forth by the ancient Greeks is now dispensed with in favor of an investigation into the psychological aspects of the symbology. Today the emphasis on psychology over scientific observation has left astrologers with fewer assumptions but far less ground to work within. Still this new focus on minimized influences has not robbed astrology of its power to cause reflection and insight for the human mind.
The purpose of Natal astrology is simple and direct, to orient and compose the individual within a structured mirror of wholeness and completion. Within that wholeness though are divisions that make up the whole being and can easily be categorized into the various parts of astrological philosophy. This includes but is not limited to the dichotomies of active and passive modes, the triplicity of qualities, the four elementals, and so on through to the many planets which represent the ideals of selfhood and the twelve zodiacal signs which are the reflections of those ideals.
All these various parts make up a structure through which the interpretation and reading of the individual chart is built upon and are reflected in one way or another by individual psychology. Once the various parts are identified, it is the individual's role to evaluate and compare what is interpreted against their own history. The naive and unethical practice of projecting a rational or reality onto an individual rather than allowing them to manifest the ideal aspect of a symbol is something to warn against.