There is going forward and there is going backwards, there is success and there is failure, there is light and there is darkness, there is joy and there is sadness, there is birth and there is death. All things that we can know, feel and perceive have their opposites. It is the opposite quality which brings about balance. The world would not exist if there were not water and earth. Every thing and every being needs these two qualities in order to exist, to act, and to fulfill the purpose of life; for each quality is incomplete without the other. ... by a deep insight into nature we discover that the creation is the same as the Creator, that the source is the same as the goal, and that the two only mean one. There are two ends to a line but the line is one, and this oneness is manifest in all things, though man seldom gives any thought to this subject. This amazing manifestation, this world of variety, keeps us so puzzled, so confused, and so absorbed in it that we hardly give ourselves any time to see this wonderful phenomenon: how the one and only Being shows Himself even in the world of variety.