"That which is, is. That which will be, will be. That which was, never happened."
Um yeah I have no idea why I just thought that but it was funny to me. Anyway it has a bit of a point. We can't change that which is happening as it happens to us. We can only change how we react to it. We can't change what will happen in the future. We can only prepare ourselves for all possibilities as best we can. We can't change what has already happened. We can only learn from it and be better prepared the next time it happens.