I bet if you look back to those tough times in your lives, you will see something that came from it. When we go through a divorce, loss of a loved one, bankruptcy, injury or anything else life-changing, we think our lives are over. In a way, life as we knew it is over, but we found a way to redefine that part of our lives and move forward. Most successful people (if not all) have a pivotal point in their lives where they hit rock-bottom or major adversity and made it through it. If you are going through this pain now, know it is just a season and you will get through it.
My favorite book on the topic is: Resilience by Eric Greitens. I wish our resiliency training was based on this book, it is amazing and a must read for everyone.