Why can't I learn this

How often in life have you or I tried to learn something that it seemed others learned so easily? Why could we not learn it? Maybe we needed a different way of learning or just a different teacher? One thing that pointed me in this direction was my sister. One day she was applying for a job. She was young with little experience. The employer kept asking is she knew how to do things she had not been shown. Finally in flustration she told him, I am smart enough to learn anything you are smart enough to teach me. She worked that job successfully for many years.