It is in the aligning of the three vehicles, the physical, the emotional, and the lower mind body, within the causal periphery, and their stabilising there by an effort of the will, that the real work of the Ego or Higher Self in any particular incarnation can be accomplished. The great thinkers of the race, the true exponents of lower mind, are fundamentally those whose three lower bodies are aligned; that is to say those whose mental body holds the other two in circumspect alignment. The mental body, then, is in direct communication, unobstructed and free from interference, straight through to the physical brain.