A story

I heard this story from my Shaolin teacher and it goes:

There were once four horses and along with them were four masters.
The first master would order his horse to move. It would move.
The second horse would only move when it saw the shadow of its master holding the whip.
The third horse would only move when its master began to whip it.
The fourth and final horse did not move at all, even when its master continuously whipped it.

Moral: humans, including myself are these horses. Rarely are there the fourth horses, yet rarely are there the first horses; We need to be in pain or trouble before we act.