Boris Becker should not have won Wimbledon for he was only 17. Paul Keating should not have been a prime minister for he dropped out from highschool. Bill Gates should not have been the richest man, for he didn't finish uni. Einstein should not have changed the course of Physics for he was only a clerk. And Stephen Hawking should not have written a book for he can't even write.
Excuses are always plenty.
It's you who has changed me. It's your will that I want to follow. It's your fight that I want to learn. And I want to thank you for giving me this blind courage to write this book, and now write you this letter. There's only one thing that I want to raise with you in this letter, and it's Einstein's second postulate.