After the passage of time, things assume a shape, a constancy, and after the passage of more time, it's like an applecart - sturdy, dependable, not very fast moving.
Sometimes, things take a turn, a sharp turn, and suddenly the applecart is upset and everything gets spilled all over.
If lucky, and the apples are good, with a little work and effort, the load can be picked up and put back in the cart - perhaps not in the same order and places, but back in the cart, cart upright and ready, eventually, to resume it travel to its destiny.
The cart is tipped. It's time to set it upright - and put the apples back where they belong.