Keeping some peace of mind when the world around you is in turmoil is a great challenge. Mohammed finds it hard to maintain concentration, he sleeps 12 hours a night but awakes exhausted. He lives in Afghanistan, which is in a state of conflict, and spends a lot of time on social media. Sister Dang Nghiem offers advice on how to make your mind a beautiful refuge from the chaos and insecurity in the outside world. She discusses the North Vietnamese communists taking over Saigon when she was a child and the BBC’s Sana Safi compares her own experience of life in Afghanistan under the Taliban.