My mother once said to me, 'I wish you could feel the way I do for eighteen seconds. Just eighteen seconds, so you'd know how awful it is.' I thought about it. Realised we could all learn from being in another person's head for eighteen seconds. Eighteen seconds inside Grandma Roberts' head as she sat alone with her evening cup of tea, us girls upstairs in bed. Eighteen seconds inside one-year-old Colin's head when he woke up in a...