I for one would never be able to get out of bed in the morning if I was forced to feel as much pain over every single death in the world as I have felt over the past week for those who died in the London bombs. I would feel permanently depressed, as if nothing was worth living for.

Yes - I've been getting exactly this feeling since Holly was born, over the number of children in the world who are abused, starving or neglected. It makes me miserable to agonise about it and it doesn't really help either me or them.