I think that is a good quote. But I think it is easy to be too harsh on folks who are very ill and lay a blame game on them. Bipolar is a serious condition. Sure, life is what you make it, but it is also what you have been given. The balance is in making the best out of what you have been given.
I like the book "The Four Agreements." In that book he talks about always doing your best. But your best is different on different days. Some days you may be sick. Some days you may be at the top of your game. But each day, always try to do your best. I try to live by that.