TED talk: the key to success? Grit

I found this wonderful TED talk by Angela Lee Duckworth that sounds so true. It is not the talent or the intelligence that is able to predict success but “grit”, the ability to live life as a marathon and not as a sprint. And it also very well resounds with the impression I have about highly achieving individuals: It helps to have a demanding hobby where you train your brain to never stop and advance just for the sake of advancing. People who have this mindset will be able to handle almost any challenge they encounter.