I think it is true. It is a pretty scary thing to be dreaming about something dear to your heart and never going for it with a real big force. Realizing somewhere much later in your life that you actually never did that thing, you always wanted to do. You were dreaming about it and thinking what if, but never actually did much to achieve it. And now, it might be too late.
The easy solution to this problem of course is to just do everything you always wanted to do or achieve everything you always wanted to achieve or at least give it a very big try. For that big try you will be forgiven, but for never trying hard enough you will never forgive yourself.
So listen, really listen to yourself. What is that thing you always wanted to achieve or do? Loose 50 pounds? Run marathon under 4 hours? Climb McKinley? Become vegetarian? Get in a perfect shape and health? Collect 100 weird dolls or surf Fiji naked?
Whatever it is. Write it down and than just do it or achieve it. You already know how.