In every age, or in times of exceptional crisis, great spiritual teachers have come into the world to enable humanity to take its next evolutionary step. Each has given a body of teaching, emanating from a common wellspring of ancient knowledge known as the Ageless Wisdom. As an esoteric science - meaning simply that it lies beyond the understanding or comprehension of the average person - it presents a systematic and comprehensive account of the evolutionary process, in man and nature, from an energetic standpoint: how the universe came to exist, how it operates, and humanity’s place within it. Esotericism, as it is sometimes called, is also the art of working with those energies, which emanate from the highest spiritual sources. From behind the scenes, these teachings have guided and shaped civilization after civilization, leading to all the great advances in human endeavor, be they in the sciences, politics, the arts or religion.