How do you measure your life? What moments have changed your life … or will change your life? Are you living or existing? - Buzz Aldrin

welcomed the opportunity to become the first astronaut trained underwater in a swimming pool to simulate the effects of neutral buoyancy, trying to maneuver in a weightless environment in space. Some of my colleagues thought I was being eccentric, but the sensations in the pool prepared me for what it might feel like drifting along at 17,500 miles an hour, tethered to a spacecraft.

One of the keys to a successful life in any field is learning to take responsibility for ourselves, rather than waiting for someone else to do something for us.

A lot of times when you just don’t want to think about something, when there is nothing you can do and the waiting is just unbearable, it helps to demand a lot from yourself, to do or learn more than you thought you could, and just let your concentration get you through the bad time.