For if we do not recognise the Central Mind as the source of our vitality, we are literally "fighting for our own hand," and all the other hands are against us, for we have lost the principle of connection with them. This is what must infallibly happen if we rely on nothing but our individual will-power. But if we realise that the will is the power by which we give out, and that every giving out implies a corresponding taking in, then we shall find in the boundless ocean of central living Spirit the source from which we can go on taking in _ad infinitum_, and which thus enables us to give out to any extent we please. But for wise and effective giving out a strong and enlightened will is an absolute necessity, and therefore we do well to cultivate the will, or the active side of our nature. But we must equally cultivate the receptive side also; and when we do this rightly by seeing in the Infinite Mind the one source of supply, our will-power becomes intensified by the knowledge that the whole power of the Infinite is present to back it up; and with this continual sense of Infinite Power behind us we can go calmly and steadily to the accomplishment of any purpose, however difficult, without straining or effort, knowing that it shall be achieved, not by the hand only, but by the invincible Mind that works through it. "Not by might, nor by power, but by My Spirit, saith the Lord of hosts." 1902. XXIII THE CENTRAL CONTROL In contemplating the relations between body, soul, and spirit, between Universal Mind and individual mind, the methodised study of which constitutes Mental Science, we must never forget that these relations indicate, not the separateness, but the unity of these principles. We must learn not to attribute one part of our action to one part of our being, and another to another. Neither the action nor the functions are split up into separate parts. The action is a whole, and the being that does it is a whole, and in the healthy organism the reciprocal movements of the principles are so harmonious as never to suggest any feeling than that of a perfectly whole and undivided self. If there is any other feeling we may be sure that there is abnormal action somewhere, and we should set ourselves to discover and remove the cause of it. The reason for this is that in any perfect organism there cannot be more than one centre of control.