“Checklists are often conceived in the aftermath of experiences. You don’t make a travel checklist until you’ve had a vacation where you realise only once you’ve checked in to your hotel room that you forgot to carry traveler’s cheques. You don’t realise you need to have a classic black outfit in your wardrobe unless you’re invited to a black-tie event, and have nothing to wear. You don’t know that a toxic boss is just as harmful to your mental health as a toxic relationship until you’ve had both. You don’t know what’s going to break your heart unless your heart has been broken.”