The article is excelent. However. Moses came down from Sinai and gave over the oral Torah to sages in the community including his brother Aharon. I dont understand where Ezra comes in. Secondly Moses Is considered the greatest prophet. Therefore he was able to project Gods words in the absolute purity and Prof Heschels thought on Prophets does not apply in this case.
High school teacher's union threatens strike (Haaretz)
from the article: Moses as a revolutionary leader, the Torah as revolutionary book