In short, we need to resist two opposite temptations. Both of them create anxiety and frustration and neither of them are effective in practice. One is to imagine that we are solely responsible for the future of the planet, when in truth that is in the hands of God. ‘For us there is only the trying,’ as the poet T.S. Eliot puts it, ‘The rest is not our business’.[xiii] The other temptation is to give up because we feel that we can achieve so little. For the trying is our business. To try to live our lives wisely, justly, with courage and temperateness, and on top of all these to put on love[xiv] – that is our Christian calling. And that, surely, would be no small achievement, whatever its global effects.