Every experience, whether good or bad, leads us to where we are today. The outlook we have on life determines the direction we will take.
With a bleak outlook, we might not be so willing to move forward as we reason that things are pointless so why bother. When our point of view shifts towards the positive, we are then better capable of dealing with the challenges life brings our way.
Though we might not see it at the moment, everything which happens does so for a reason. We can sit still and resist change or we can embrace it with a resolute state of mind. Either way life moves forward and it is up to us to determine the path we wish to take.