I was lucky enough to spend ten or so hours with Amit over the span of six or eight years after he left Google. He has a fantastic ability to find the simple core of very complicated things, making it easy for others to understand. People repeatedly thought it was so impressive that I understood deep concepts so thoroughly. Then I'd say, "wait, let me draw the simple line chart on the whiteboard that Amit drew for me." Then they immediately understood it just as well as I did. My time with him always left me feeling inspired. He's a truly nice guy too.