If you were to hold a vivid, fearful picture in your imagination, your body would respond through the autonomic nervous system, with a feeling of uneasiness, upset stomach, elevated pulse and blood pressure, sweating and dryness of the mouth.
However, if you were to hold a pleasant, relaxing image in your mind, your body would respond with a lowered heart rate, decreased blood pressure, and relaxed muscles.
Remember, what the mind pictures and harbors, the body manifests.
"It doesn't matter how many say it cannot be done or how many people have tried it before; it's important to realize that whatever you're doing, it's your first attempt at it."
~Wally Amos
The first step to accomplishing any task is believing that you can. You begin with this belief and then figure out what you need to do to complete the task.
