Paulo Coelho said this quote

It's not my story anymore: whenever I speak about the past now, I feel as if I were talking about something that has nothing to do with me. All that remains in the present are the voice, the presence, and the importance of fulfilling my mission. I don't regret difficulties I experienced; I think they helped me to become the person I am today, I feel the way a warrior must feel after years of training; he doesn't remember the details of everything he learned, but he knows how to strike when the time is right.