Gayle Forman said this quote

Sometimes fate or life or whatever you want to call it, leaves a door a little open and you walk through it. But sometimes it locks the door and you have to find the key, or pick the lock, or knock the damn thing down. And sometimes, it doesn't even show you the door, and you have to build it yourself. But if you keep waiting for the doors to be opened for you... I think you'll have a hard time finding single happiness, let alone that double portion.