Lactantius

“ Come, let us now consider whether a teacher sent from heaven can fail to be perfect. I do not as yet speak of Him whom they deny to have come from God. Let us suppose that some one were to be sent from heaven to instruct the life of men in the first principles of virtue, and to form them to righteousness. ”

“ See, pain and death have power over me also; and I overcome those very things which you fear, that I may make you victorious over pain and death. I go before you through those things which you allege that it is impossible to endure: if you are not able to follow me giving directions, follow me going before you. ”

“ It is befitting that a master and teacher of virtue should most closely resemble man, that by overpowering sin he may teach man that sin may be overpowered by him. But if he is immortal, he can by no means propose an example to man. ”

“ Hence it comes to pass, that an earthly teacher cannot be perfect. But a teacher from heaven, to whom His divine nature gives knowledge, and His immortality gives virtue, must of necessity in His teaching also, as in other things, be perfect and complete. But this cannot by any means happen, unless He should take to Himself a mortal body. And the reason why it cannot happen is manifest. For if He should come to men as God, not to mention that mortal eyes cannot look upon and endure the glory of His majesty in His own person, assuredly God will not be able to teach virtue ”

“ In this way all excuse is taken away, and you must confess that man is unjust through his own fault, since he does not follow a teacher of virtue, who is at the same time a guide. You see, therefore, how much more perfect is a teacher who is mortal, because he is able to be a guide to one who is mortal, than one who is immortal, for he is unable to teach patient endurance who is not subject to passions. ”

“ No one can doubt but that this teacher, who is sent from heaven, would be as perfect in the knowledge of all things as in virtue, lest there should be no difference between a heavenly and an earthly teacher. For in the case of a man his instruction can by no means be from within and of himself. [1] For the mind, shut in by earthly organs, and hindered by a corrupt [2] body, of itself can neither comprehend nor receive the truth, unless it is taught from another source. ”

“ Otherwise, if it is the greatest virtue patiently to endure pain for the sake of righteousness and duty, if it is virtue not to fear death itself when threatened, and when inflicted to undergo it with fortitude; it follows that the perfect teacher ought both to teach these things by precept, and to confirm them by practice. ”

“ For he who gives precepts for the life, ought to remove every method [5] of excuse, that he may impose upon men the necessity of obedience, not by any constraint, but by a sense of shame, and yet may leave them liberty, that a reward may be appointed for those who obey, because it was in their power not to obey if they so wished ”

“ Nor, however, does this extend so far that I prefer man to God; but to show that man cannot be a perfect teacher unless he is also God, that he may by his heavenly authority impose upon men the necessity of obedience; nor God, unless he is clothed with a mortal body, that by carrying out his precepts to their completion [10] in actions, he may bind others by the necessity of obedience. ”