Always remember you fly an aeroplane with your head, not your hands.

Never let an aeroplane take you somewhere your brain didn't get to five minutes earlier.

You're always a student in an aeroplane.

* There seem to be lots of aviation jokes and truisms (often the same thing). A good collection is here

This would have to be the place for John Gillespie Magee's classic poem, "High Flight".
There are some variations, and we must remember the version with the FAA supplement.