The Old Lion & the Fox
The Fox came too, but he was very cautious about it. Standing at a safe distance from the cave, he inquired politely after the Lion's health. The Lion replied that he was very ill indeed, and asked the Fox to step in for a moment. But Master Fox very wisely stayed outside, thanking the Lion very kindly for the invitation.
"I should be glad to do as you ask," he added, "but I have noticed that there are many footprints leading into your cave and none coming out. Pray tell me, how do your visitors find their way out again?"
Take warning from the misfortunes of others.