There’s not much you can say about Paul McCartney that hasn’t already been written and/or said. He is one of the most important songwriters of the past century and I’ve always found peace and enjoyment through his music. He’s been criticized for not having the same edge as his songwriting partner from The Beatles – John Lennon, but my personal opinion is that this has never been who he is. His style is more subtle and melodic but also equally full of meaning. He doesn’t have to hit you over the head with a hammer to get his point across.
I’ve always guessed Paul’s nature to be that of contented not angry man, which is fine by me. Not all of his solo albums have been magical but they have all had moments of magic and beauty. It also feels like as he ages he has even more personal and profound things to say. It’s a gift that we have such a talented person offering up his thoughts on aging, relationships and navigating the inevitable challenges and wonders of life. I am especially fond of this song from the late 1970s because of its implied hopefulness. I also believe that at a deeper level the song is about society as a whole, not just a personal relationship. We could all benefit from more emotional resilience, perspective and “…a little luck.”
Ed Robinson's Music Appreciation Blog 
I think that all true creatives require true emotional sparks in their life to create their best work, Paul’s best work has always came after his biggest Ups & Downs in his life. It’s hard to dig very deep in the bowl of happiness.