It’s hard to keep going if you feel isolated.
Picture the scene. You’re at Kings Cross, boarding a train to Edinburgh. A large crowd is watching the departure signs. Finally, a platform number: platform 4. The crowd surges that way, and you’re among them. But once you’re through the ticket gates, most people board the train the other side, on platform 3. You get on the Edinburgh train, along with a number of others. And you sit watching platform 3 fill up. And you wonder. Did I get on the right train?