[20] For, in real truth, that man alone is free who has God for his leader; indeed, in my opinion, that man is even the ruler of all others, and has all the affairs of the earth committed to him, being, as it were, the viceroy of a great king, the mortal lieutenant of an immortal sovereign. However, this assertion of the actual authority of the wise man may be postponed to a more suitable opportunity. We must at present examine minutely the question of his perfect freedom.