JUST as the Written Law given by Moses emanates from God, whilst He Himself only proclaimed the first two commandments of the Decalogue, owing to the Israelites being too terrified to hear God's voice (Deut. 20. 19), and the whole of the Torah was then conveyed to Israel by Moses, so he likewise received the Oral law, which he was not allowed to commit to writing. This Oral law had to be taught by word of mouth side by side with the Written law, and thus the former became an unfolding and sequel to the latter. This, says the Midrash, 1 is meant by the words: 'Only take heed to thyself and keep thy soul diligently lest thou forget the words--דברים meaning "words" as well as "things"--which thine eyes have seen, and lest they depart from thy heart all the days of thy life' (Deut. 4. 9). 'The words which thine eyes have seen' means the Written words which can be seen, and 'lest they depart from thy heart' refers to the Oral law, words committed to memory, laid up in the heart.