There are times when it seems that conductor/pianist Daniel Barenboim must be the busiest speechmaker in the classical music world. “This week, Barenboim puts down his baton and some of his worries to deliver the first in his series of the BBC’s annual Reith Lectures. He will argue that music lies at the heart of our understanding of what it is to be human and his theme will encompass how music provides a way of making sense of the world: of politics, of history and of our future.”