From http://everydayzen.org/ – these Podcasts by Norman Fischer are excellent commentaries on the Vimalakirti Sutra.
The sutra explains the meaning of nonduality directly with the words of the Buddha. An important aspect of this scripture is that it contains a report of a teaching addressed to both arhats and bodhisattvas by the layman Vimalakīrti, who expounds the doctrine of Śūnyatā, or emptiness, to them.
You may download the Sutra here: https://holybooks-lichtenbergpress.netdna-ssl.com/wp-content/uploads/Vimalakirti-Nirdesa-Sutra.pdf
Norman Fischer, 01/08/20
Norman Fischer, 01/15/20
Norman Fischer, 01/22/20