There is a pair of opposites in all things, and in each there exists the spirit of the opposite: in man the quality of woman, in woman the spirit of man, in the sun the form of the moon, in the moon the light of the sun. The closer one approaches reality, the nearer one arrives at unity. The evidence of this realization is that no sooner a question has arisen in the heart, than the answer comes as its echo within or without.