I feel like this quote represents Pa's journey positively. He feels like he failed the family and that he didn't do enough. But as it says, Failing is not always failure. I like this quote too, it's so true in many aspects of life.
I hope this is one thing I am able to teach my kids. Be an INDIVIDUAL don't worry about being like everybody else they are just jealous they are not as awesome and comfortable with their selves as you are simply being yourself all the time.