This entire manifested or out-breathed universe is, he says, the expression of the divine desire for holy sport and play. The Heart of God enjoys this myriad play of created beings, all tuned as the infinite strings of a harp for contributing to one mighty harmony, and all together uttering and voicing the infinite variety of the divine purpose. Each differentiated spirit or light or property or atom of creation has a part to play in the infinite sport or game or harmony, "so that in God there might be a holy play through the universe as a child plays with his mother, and that so the joy in the Heart of God might be increased,"[17] or again, "so that each being may be a true sounding string in God's harmonious concert."[18] This eternal, interior World--the Mirror in which the Spirit manifests Himself--is a double world of darkness and light, for there can be no manifestation except through opposites.[19] There must be yes and no. In order to have a play there must be opposing players. In order to have life and reality there must be conflict and conquest. As soon as the forth-going Word of God is differentiated into many concrete expressions and the fundamental Unity of the Abyss is broken up into particular desires and wills, there is bound to be a clash of opposites--will and contra-will, strain and tension, light and joy and beauty, and over against them pain and sorrow and evil. Evil must appear as soon as there is {178} process of separation, differentiation, variety, specialization and particularity.[20] Darkness appears as soon as there is a contraction or narrowing into concrete desire and will. Both worlds--the light world and the dark world--are made by desire and will. Narrowing desires for individual and particular aims, which sever a being from the total whole of divine goodness, make the kingdom of darkness, while death to self-will and a yearning desire and will for all that is expressed in the Heart and Light of God, in the Person of His Son, make the kingdom of Light. Lucifer--the awful example of the dark World--fell because he stood in pride and despised the Birth of the Heart of God and its gentle, universalizing love-spirit; and so his light went out into darkness. His climbing up into a severed will was his fall. The more he climbed toward the sundered aim of his own will and turned away from the Heart of God, the greater was his fall, for to turn away from the Heart of God is always to fall.[21] There is no darkness, no evil, in angel or devil or man, except the nature of that particular being's own will and desire--both darkness and light are born of desire. The origin of the fall of any creature, therefore, is not outside that creature, but within it.[22]