You must have thought atleast once that what can I do or what is my limit.
There are lots on fiction movies that says that humans uses only 2-3 % of his mind. We developed this much by using just 2-3 % of our mind then much we would have developed if had used 100% ( totally hypothetical).
So , never think that's you can't this, that or you are uncapable because whatever you are doing you are just using 2-3 % and you can do 50 times better than that .
Never give up guys !!!