If you saw Gravity, you know there’s plenty that can go wrong in space. Watching Astronaut Chris Hadfield’s TED Talk about his personal experience going temporarily blind on a space walk can help you understand that a spacewalk can turn into a terrifying experience quickly. However, the real takeaway from Hadfield’s astronaut experience is learning to differentiate between fear and danger. Fear can play a big part in an entrepreneur’s journey, but rarely are you in danger. Know how to judge your fear to conquer it and achieve ultimate success.