One of the most predictable things in life is there will be change. You are better off if you can have a say in the change. But you are ignorant or naive if you don't think there will be change whether you want it to or not.
There are no mistakes. The events we bring upon ourselves no matter how unpleasant are necessary in order to learn what we need to learn whatever steps we take they're necessary to reach the places we've chosen to go.
