Thank you Richard:
Not only do I use it as a sign off here, it is the very last advice I give all the pilots that I teach the art of flying to.
Unfortunately far to many pilots forget this very simple admonition and allow themselves to say yes,...... and die.
By the way it has been decades since I taught flying at the ab-initio level.
The only reason I still instruct is I am one of the very few left over from the days of the wooden ships and the iron men.
So I enjoy passing on some of the skills I have learned to those who must take over from my generation.
Cat Driver:
................
The hardest thing about flying is knowing when to say no.