The longer you kick dirt on launch, the more likely you are to blow it. When you re flying and the stuff hits the fan, the fan usually increases in speed. Committing to aviation takes a certain amount of self-delusion. Each flight is a gift. Flying is the second greatest thrill known to mankind.
Landing is the first.
You are always a student in an aircraft. Always leave yourself a way out. You should have been here yesterday. If you launch, landings are always mandatory.