And such an one before he practised was a pupil, having another to teach him; but when he became competent himself to guard what he had learnt, he then received the power and rank of a teacher, having appointed his brother, his own uttered discourse, to the ministration of teaching.
For it is said that, "His brother shall minister;" In quoting this passage above, I used the translation as given in the bible, they " shall minister with their brethren in the tabernacle;" but the Greek of the text was the same in that passage as it is here. so that the mind of the good man is the guardian and steward of the doctrines of virtue. But his brother, that is to say, uttered discourse, shall minister instead of him, going through all the doctrines and speculations of wisdom to those who are desirous of instruction. On which account Moses, also, in his praises of Levi, having previously said many admirable things, adds subsequently, "He has guarded thy oracles and kept thy covenant." Deuteronomy xxxiii. 9. And presently he continues, "They shall show thy justification to Jacob, and thy law to Israel. Therefore, he here clearly asserts that the good man is the guardian of the words and of the covenant of God. And, indeed, in another place he has shown that he is the best interpreter and declarer of his justifications and laws; the faculty of interpretation being displayed through its kindred organ—the voice, and guardianship being exerted through the mind, which having been made by nature as a great storehouse, easily contains the conceptions of all things, whether bodies or things. It would therefore have been worth the while of this self-loving Cain to have been the keeper of Abel; for if he had kept him he would have attained to a compounded and moderate kind of life,
 In quoting this passage above, I used the translation as given in the bible, they " shall minister with their brethren in the tabernacle;" but the Greek of the text was the same in that passage as it is here. 
 Deuteronomy xxxiii. 9. 
 
and would not have been filled with unmodified and absolute wickedness.
 And God said, "What hast thou done? The voice of the blood of thy brother cries out to me from out of the ground." Numbers xxiii. 8. The expression, "What hast thou done," shows indignation at an unhallowed action, and also ridicules the man who thought he had committed the murder secretly. The indignation now arises at the intention of the man who has done the deed, because he designed to destroy what was good; but the ridicule is excited by his thinking that he has plotted against one who is better than himself, and at his having plotted not so much against him as against himself. For, as I have said before, he who appears to be dead is alive, inasmuch as he is found to be a suppliant of God and to utter a voice; and he who believes that he is still alive is dead, as to the death of the soul, inasmuch as he is excluded from virtue, according to which alone he is worthy to live. So that the expression, "What hast thou done?" is equivalent to, "Thou hast done nothing; thou hast done no good for thyself."