Limitations are usually based on what your heart is capable of accepting at a given time. Most of the things you assume to be impossible or above your capabilities are there only because you have not been able to think beyond that level.
We all have the ability to achieve far beyond what our hearts can conceive now. However, most people have placed limitations on themselves with their imaginations. Remove the limitations you placed on yourself and see yourself start doing what you would otherwise regard as wonders.