Rabbi Sacks had a tradition, to deliver a pre-Rosh Hashanah shiur every year at the London School of Jewish Studies (LSJS).
The Ellul shiur(lecture) featured here, was his 11th as Chief Rabbi. It was delivered and recorded in September 2011.
Mekorot (sources) are embedded within the video and can be seen on screen if you watch – rather than listen – to the video. To watch the video, please visit https://www.rabbisacks.org/videos/chief-rabbis-annual-elul-lecture-at-lsjs/