A regular Things Unseen presenter, Mark Dowd is no stranger to doubt. In this edition of our A-Z, he recalls what happened when, as a young friar, he was overcome by it one Easter day.

He also reflects on why the “lust for certainty” is misguided, and argues that even Christ on the cross had a moment of agonizing doubt when he cried out, “My God, my God, why have you forsaken me?” Yet, Mark says, Christians know that that was not the end of the story – and this, he argues, means that we are given permission to have doubt.

The A-Z of Things Unseen is an eclectic mix of voices from different faiths, reflecting on ideas and concepts which have a (sometimes hidden) spiritual dimension.