My Mentor shared this didactic riddle with me a couple of weeks ago.
source
Five frogs are sitting on a log. Four DECIDES to jump off. How many are left?
"One", I quickly answered.
"No", he countered.
"The correct answer is Five", he continued after seeing the confusion on my face.
"Why?", I asked out of intense curiosity.
He cleared his throat and with a very soft voice he said, "Because there is a difference between DECIDING and DOING".
That point was driven straight to my heart. Whether it was because of the way he said it or the fact that it was the truth, that point has stuck.