Answer:
The quote, in my mind, means that a problem or a challenge gives you a good story to tell but if you overcome the problem, you the person, have a story along with a lesson. It can make a difference in your life because you have now learned what to do or what not to do in a specific situation. It can make a difference to others because you teach other people your lesson and/or inspire them to overcome something that is troubling them.
Step-by-step explanation:
Say you have a problem like losing a friend, right now you just have a story but if you maybe appolgize or maybe find a new friend, you have grown and moved on. This gives you a lesson with friendships and a story to tell.