After reading this book it is clear for me that people like Elon Musk, and Steve Jobs look at life with a higher purpose in mind. They don't slow down for anybody and keep always going forward because they know they are creating something that will revolutionize the future.
It's perceived as selfish when they simply fire someone who is loyal and has sacrificed a lot for the company. Elon can be seen as a villain but in true he simply is looking at the bigger picture.
This man is building humanity's future, electric cars that don't damage the environment and can be recharged within few minutes, solar panels that will someday replace the electrical systems we currently use, rockets that aim to take people to Mars to populate it. He is a visionary and I am glad I decided to read Ashlee Vance's book about him.