There was once a scientist. After a lot of practice & efforts, he developed a formula & learned the art of reproducing himself. He did it so perfectly that it was impossible to tell the reproduction from the original.
One day while doing his research, he realized that the Angel of Death was searching for him.
In order to remain alive, he reproduced a dozen copies of himself. The reproduction was so similar that all of them looked exactly like him.
Now when this Angel of Death came down, he was at a loss to know which of the thirteen before him was the original scientist, & confused, he left them all alone & returned back to heaven.
But, not for long, for being an expert in human nature, the Angel came up with a clever idea.
He said to the scientist addressing all thirteen of them, "Sir, you must be a genius to have succeeded in making such perfect reproduction formula of yourself. However, I have discovered a flaw in your work, just one tiny little flaw."
The scientist immediately jumped out & shouted, "Impossible! where is the flaw?"
"Right here," said the Angel, as he picked up the scientist from among the reproductions & carried him off.
The whole purpose of the scientist & his formula of reproduction failed as he could not control his pride, so he lost his life.
So when man's Knowledge & Skills takes him to the top of the ladder & makes him successful, however, the three letter word "EGO" can pull him down to earth immediately at its double speed.
Moral: So don't allow Ego to kill you, Instead of it kill your Ego.
Reference: https://thinknbebest.blogspot.com/2015/07/honest-relations-are-just-like-water.html