Immediately surrounding the atmosphere of the Earth was the sphere of elemental fire. Around this was the Heaven of the Moon, and encircling this, in order, were the Heavens of Mercury, Venus, the Sun, Mars, Jove, Saturn, the Fixed Stars, and the Crystalline or first moving Heaven. These nine concentric Heavens revolved continually around the Earth, and in proportion to their distance from it was time greater swiftness of each. Encircling all was the Empyrean, increate, incorporeal, motionless, unbounded in time or space, the proper seat of God, the home of the Angels, the abode of the Elect. The Angelic Hierarchy consisted of nine orders, corresponding to the nine moving heavens. Their blessedness and the swiftness of time motion with which in unending delight they circled around God were in proportion to their nearness to Him, —first the Seraphs, then the Cherubs, Thrones, Dominations, Virtues, Powers, Princes, Archangels, and Angels. Through them, under the general name of Intelligences, the Divine influence was transmitted to the Heavens, giving to them their circular motion, which was the expression of their longing to be united with the source of their creation. The Heavens in their turn streamed down upon the Earth the Divine influence thus distributed among them, in varying proportion and power, producing divers effects in the generation and corruption of material things, and in the dispositions and the lives of men. Such was the general scheme of the Universe. The intention of God in its creation was to communicate of his own perfection to the creatures endowed with souls, that is, to men and to angels, and the proper end of every such creature was to seek its own perfection in likeness to the Divine. This end was attained through that knowledge of God of which the soul was capable, and through love which was in proportion to knowledge. Virtue depended on the free will of man; it was the good use of that will directed to a right object of love. Two lights were given to the soul for guidance of the will: the light of reason for natural things and for the direction of the will to moral virtue the light of grace for things supernatural, and for the direction of the will to spiritual virtue. Sin was the opposite of virtue, the choice by the will of false objects of love; it involved the misuse of reason, and the absence of grace. As the end of virtue was blessedness, so the end of sin was misery. The cornerstone of Dante’s moral system was the Freedom of the Will; in other words, the right of private judgment with the condition of accountability. This is the liberty which Dante, that is man, goes seeking in his journey through the spiritual world. This liberty is to be attained through the right use of reason, illuminated by Divine Grace; it consists in the perfect accord of the will of man with the will of God.