I've played thousands games of Chess, and I feel like I'm no better than I was after the first few hundred. Sure there might be games in which you're totally in the zone against a much better opponent and there's nothing like the thrill of making that checkmate, but even if you're a Grandmaster there's room for improving your game.
Now, I'm not the kind of chess player who has all the openings memorized. I only know the openings that I like to use. I play them because they have seemed to work for me all this time. This book is neat in which it shows you how to think, rather than telling you what to do. It shows the logic of this and that, and you absorb this.