Do dreams become true?

It's very important to pursue your dreams and to try that they become true. But what happen with all these people that have a dream and this dream doesn't become true for whatever reason? These people have to know that there are second chances and that if some dreams disappear, other dreams will appear. When a dream doesn't become true, you must accept it and you don't have to frustrate you. This is an obligation, not an option, if you want to be happy in your life and not having a problem. We mustn't demand more that we can give, and this is a important factor to take into account. Life has a lot of second chances and opportunities, so don't worry if your train has escaped because other trains will come.