"I'm afraid that if my dream is realized, I'll have not reason to go on living"
People use their dreams as reasons to do things in order to get closer to achieving their dream. That creates hard wok and perseverance within that person. If they realize their dream, they fear that they will have no reason for going on with their life because they aren't working toward anything.
"When a person really desires something, all the universe conspires to help that person to realize his dream"
I believe that this quote is trying to convey the message, that if someone truly wants something and his willing to work hard to achieve it the universe will help and guide them in order to get what they want.
"If he abandons that pursuit, it's because it wasn't true love...the love that speaks the language of the world."
Sometimes a person you love is in the way of you realizing your personal legend. You can't let love hold you back from doing things that make you grow as an individual. Because if it really is true love, it will still be there when you get back.