I never really understood that term until I started flying. When you are on the ground you are not in the air doing what you want to. Last night I was planning on doing a night flight the weather was beautiful and the airport looked so cool all lit up at night. Everything looked good until we taxied up to the runway and did the run-up check where we check everything one last time before we take off. The alternator indicator was reading 0 amps which is bad meaning we were only run on the battery which is not safe so so taxied back and wrote it up and will try again another night. But that is part of flying is knowing when not to fly.
Other news, my brother Brendon got his mission call today: Seattle, Washington!