It seems like this song is pretty much self explanatory but I am just going to add my idea. I think that it means that he has struggled through so much pain and struggles in his life- he has been beaten and broken. He has just realized that he has to keep moving forward no matter what has happened to him in his past. His life still moves on so he gets more chances to make things better but he now knows that he needs to try to not to rely on the past to restrict him in any way or else it will just get him down. After realizing he needs to stay motivated to get through life, he recognized the fact that he is "built to last" anything life throws at him which can then give him to confidence to face his present and future challenges.
It seems like this song is pretty much self explanatory but I am just going to add my idea. I think that it means that he has struggled through so much pain and struggles in his life- he has been beaten and broken. He has just realized that he has to keep moving forward no matter what has happened to him in his past. His life still moves on so he gets more chances to make things better but he now knows that he needs to try to not to rely on the past to restrict him in any way or else it will just get him down. After realizing he needs to stay motivated to get through life, he recognized the fact that he is "built to last" anything life throws at him which can then give him to confidence to face his present and future challenges.