Circus trainers used to tie a chain around a baby elephant's ankle to stop it from escaping. The chain would be connected to a tall spike which was hammered deep into the ground. As a baby, the elephant was not strong enough to pull out the spike, and so it learned not to try. As the elephant became fully grown, it continued to believe that it could not escape, even though it was easily strong enough.
The moral of the story is:
If you don't test some of your old, limiting beliefs, you will stay stuck in your present circumstances.
So how many invisible chains do you have tied around your ankles?
Successful people have learned how to break through those limiting beliefs that hold them back from achieving their goals. For example, they believe they are not too old to try something new - they are wise. Nor are they too young - they have energy. Unlike the elephant destined to walk around and around in circles, successful people choose a direction and don't give up until they get there.
You can free yourself from chains and spikes in all areas of your life. Is there a situation you seem to find yourself in time and time again? Do you feel "stuck"? If so, pick one thing hat you feel could be holding you back from achieving success. That is a strong limiting belief.
Chances are, just like the elephant doubting its own strength, you are doubting your own ability. Try acting "as if" you don't have that belief any more, and see what kind of results you get. You just might surprise yourself!