The theatre of its operations may be expanded to the magnificent proportions of a world-history, or contracted to the sphere of a single individuality: the difference is only one of scale; but the Life-principle is always the same. It is always the principle of confident Affirmation in the calm knowledge that all things are but manifestations of itself, and that, therefore, all must move together in one mighty unity which admits of no discordant elements. This "unity of the spirit" once clearly grasped, to say I am is to send the vibrations of our thought-currents throughout the universe to do our bidding when and where we will; and, conversely, it is _to_ draw in the vitalising influences of Infinite Spirit as from a boundless ocean of Life, which can never be exhausted and from which no power can hold us back. And all this is so because it is the supreme law of Nature. It is not the introduction of a new order, but simply the allowing of the original and only possible order to flow on to its legitimate fulfilment. A Divine Order, truly, but nowhere shall we find anything that is not Divine; and it is to the realisation of this Divine and Living Order that it is the purpose of the Bible to lead us. But we shall never realise it around us until we first realise it within us. We can see God outside only by the light of God inside; and this light increases in proportion as we become conscious of the Divine nature of the innermost I am which is the centre of our own individuality. Therefore, it is that Jesus tells us that the I am is "the door." It is that central point of our individual Being which opens into the whole illimitable Life of the Infinite. If we would understand the old-world precept, "know thyself," we must concentrate our thought more and more closely upon our own interior Life until we touch its central radiating point, and there we shall find that the door into the Infinite is indeed opened to us, and that we can pass from the innermost of our own Being into the innermost of All-Being. This is why Jesus spoke of "the door" as that through which we should pass in and out and find pasture. Pasture, the feeding of every faculty with its proper food, is to be found both on the within and the without. The livingness of Life consists in both concentration and externalisation: it is not the dead equilibrium of inertia, but the living equilibrium of a vital and rhythmic pulsation. Involution and evolution must forever alternate, and the door of communication between them is the I am which is the living power in both. Thus it is that the Great Affirmation is the Secret of Life, and that to say I am with a true understanding of all that it implies is to place ourselves in touch with all the powers of the Infinite.