Oliver O’Donovan is one of the most exciting theologians in the UK. He writes on current issues, like bioethics, just war, sexuality and the church. But his great strength, and the source of his evangelical authority, is his ability to show us how Christians in different periods of history have dealt with the very same problems that face us now. He is able to summarise the hard-won experience of Christians of different centuries, so we can see the intellectual resources available to us. He has just published a series of seven ‘Sermons on the issues of the day’ on Fulcrum. They are master-classes in Christian discernment. Sexuality and the unity of the church are the issues of the day, and the whole package of Christian wisdom will enable us to tackle these issues together and grow in truth and love as we do so.