As the mind of man cannot rise to any natural knowledge of God except by discursive reasoning from first principles on the works of God, that is, by the argument from effects to the first cause, so the purely spiritual being cannot rise above his own intellectual cognition of God as the cause and first principle of his own intelligent nature. It is vain, therefore, to think that it is the grossness of the body, or the body itself, which hinders the human spirit from seeing God. Separated from the body, and elevated to an equality with the highest angel, it could never possess itself of an intelligible object outside of its own supreme genus as a created spirit, outside the limit of created and finite being. It is evident that all the perfection and felicity of an intelligent being is measured and determined by its intelligence. It possesses the object in which it voluntarily rests as its chief good by cognition, and according to the mode of its cognition. No creature, therefore, by its nature, can rise to that state of immediate communion with God which is properly called friendship, which demands as its basis a similitude and equality resulting from a real filiation, such as the creative act cannot impart to a being brought into existence out of nothingness. The possession of the sovereign good belongs exclusively to the nature of God. To the created nature is due only a participation and imitation of that sovereign good within its own specific and finite limits of being. The heaven in which God eternally dwells in his own infinite beatitude is not therefore the natural term and end of man’s future destiny, nor of the natural destiny of any higher order of creatures. The distance dividing the most perfect beatitude of created nature from that of the uncreated and creative nature is equally infinite with the distance between the essence of God and created essences. The Father, the Son, and the Holy Spirit alone have natural society, each person of the Blessed Trinity with the other persons, in unity of intelligence and volition, in the possession of the divine essence, the sovereign good, the absolute beatitude. A created spirit cannot be raised to this divine level, unless God so unites his divine essence with the essence of his creature, in an interior and vital union penetrating to its very centre and the seat of its intelligent and vital action, that in the essence of God present to it as immediately as it is present to itself, it sees as through a divine medium that same divine essence as its immediate object, without losing its own proper act and distinct individuality.