Angela Duckworth is an American psychologist, best selling author and professor at the University of Pennsylvania. Her research shows that the key to excellence is not about talent but 'grit'. 

However, what is 'grit'? Can this characteristic be cultivated? The answer is definitely positive and the influence of 'grit' changes one's life profoundly. 

In an interview with CommonWealth Magazine, Prof. Duckworth shares her insights about the idea of 'grit'.