The intelligent creature participates in this intelligence, in that degree of being which God gives him. The object of the spontaneous and natural act of intelligence is the real verity of being, and by his intelligent nature he can never be deceived. The object perceived by the intelligence contains in it the good, toward which the will moves by a spontaneous and natural act. It is only necessary that the object be so placed before the intellect that it compels assent, to make all error, voluntary or involuntary, impossible. The good which is thus perfectly presented necessarily draws the will to itself, and thus immutability in good is produced. Error in the intellect is an accident and a defect in nature, and all perversion of will or evil choice is a consequence of error. The liability of sinning is therefore no necessary adjunct of the spontaneity or liberty of will which is an attribute of intelligent beings. It is removed by making the intelligence perfect. It is easy, therefore, for God to make any intelligent being immutably good, even from the beginning of his existence, since it is easy for him to give to nature any degree of perfection, within the purely natural order. In the supernatural order, the gift of the intuitive vision of the divine essence imparts to the recipient the knowledge and possession of the sovereign good, with which it is immovably united by a spontaneous and necessary act. It can no more lose its beatitude than it can lose its essence. It is as impossible for one of the blessed to be changed into a sinner, as for an angel to become an ape. Liability to error and sin belongs, therefore, not to any necessary order of things, resulting from natural and necessary laws which God is obliged to follow in creation and providence, but it is a condition of defectibility pertaining to a law of probation which God has established by his sovereign will.