I think the main theme is with every bad thing there is a good side, but with every good thing there is a bad side. So let’s break this main theme into pieces. A bad thing - *quote*. In this scene of the book, Alex’s caretaker and lifelong friend, Jack Starbright, is killed by unknowingly sitting on 30 pounds of explosives in a car.
The good side - *quote*. In this scene, Alex killed a clone of him named Julius. This clone has been dreaming for more than a year to kill Alex and was one of the people who contributed in killing Jack. By killing this clone, Alex has only killed one of the enemies. But killing something is better than nothing in this case.
A good thing would be that Alex has saved so many people and countries from destruction so maybe being a spy wasn’t so bad after all but the bad side is that he found and lost a best friend causing a lot of emotional pain and he now has to carry a life-time of memories. *quote*
So let me ask you one question: How much would you do for something that you want? Keep in mind that with every bad thing there is a good side, but with every good thing there is a bad side cause who said life was fair? Especially not to