If you have never seen a gorgeous flower in full bloom; or a spectacular sunset before, and someone described one to you, you might consider it to be a miraculous thing (which it truly is!). Once you saw a few yourself, and began to learn something about the natural laws involved, you would begin to understand how they are formed and it would seem natural to you and not particularly mysterious.
The same is true about power of concepts like positive thinking, optimistic visualization & joyful living with Laughter Yoga. What at first might seem amazing or impossible to the very limited type of education our rational minds have received, becomes perfectly understandable once we learn and practice with the underlying concepts involved. You have to practice with open mind, and your experiential learning will develop the trust.
Once you do so, it may seem that you are working miracles in your life... and you truly will be!!!