The Stoics say, “the obstacle is the path” and that is a good observation for writers to learn. Sometimes a story is just a pile of pieces that don’t fit together, or more like a puzzle that you know fits together – because you trust the people who manufacture the product – but you can’t imagine, looking at the pieces, how it does.
It takes hours of staring at shapes and colors, imagining how they fit together to reproduce the picture in your mind. It often happens that there is one piece that stands out as an impossibility. Its color does not exist anywhere in the picture. They must have put a piece from a different puzzle in this box.
And then, it fits. Not only does it fit – it is the key to the whole puzzle. After it finds its place all the other pieces fall into theirs and the impossible is transformed into the inevitable.