On the eve of the opening night of Schoenberg’s masterpiece Moses und Aron in Cardiff, WNO Artistic Director David Pountney develops a discussion with the academic and broadcaster Mona Siddiqui about the opera’s central theme – the inadequacy of language when communicating the absolutely spiritual.

Part of the One World Many Faiths series of events on faith and culture presented by Welsh National Opera and the Maimonides Interfaith Foundation.