Once you've grown up in space, moving on means moving out, not going back to Earth. Nobody wants to be a groundpounder.
If you are losing at a game, change the game.
In a tough situation, don't avoid acting just because it's easier or comfortable. Don't lapse into a passive state. People who give up, die.
The biggest mistake is being too afraid of making one.
To shine is better than to reflect.
Any technology that is distinguishable from magic is not sufficiently advanced.