“It is good to be weird. It is good to be eccentric. It is good to be separate from the crowd. The philosopher John Stuart Mill thought it was almost a civic duty to be eccentric, to break the tyranny of conformity and custom. But even if we don’t feel outwardly eccentric, we all have eccentric parts. Thoughts that crop up on the peripheries of our thinking. Random sparks we can set alight. Thoughts that offer the other point of view or the other side of a political argument. Thoughts that don’t quite fit in with our other thoughts. Tastes that go against our other tastes. And as we grow older it is good to keep tending to those unconventional parts of ourselves—the thoughts that buck the trend—because these are the parts that will keep us new and capable of surprise. They will stop us becoming a cover version of ourselves. They will help us become new songs.”