Some people say they've known they were meant to be entrepreneurs all their life, peddling lemonade since they were 6, shoveling snow, mowing lawns. Castel, however, wanted to be a pilot. I had drinks with Castel last November and talked to him about how his dreams of becoming a pilot led to his work with Warby Parker and how he left it all to bring an experience he once had on a beach in Israel to the US.