In order to have faith in his own path, he does not need to prove that someone else's path is wrong.
Paulo CoelhoWe all, at some point, grow old and acquire other qualities, and these can always be turned to good advantage.
Paulo CoelhoWhy don’t people’s hearts tell them to continue following their dreams?” the boy asked the alchemist. “Because that’s what makes a heart suffer most, and hearts don’t like to suffer." From then on, the boy understood his heart. He asked it, please, never to stop speaking to him. He asked that, when he wandered far from his dreams, his heart press him and sound the alarm. The boy swore that, every time he heard the alarm, he would heed its message.
Paulo Coelho