It is very hard to change one’s inborn nature
One day, a man was passing through a dense forest when he saw a tiger groaning with pain. It had a thorn pricked in one of its paws. Out of pity, the man took out the thorn from its paw. The tiger then roared and said to the man, “Thanks a lot, but now I will have to eat you. I am very hungry.” The man trembled with fear, but somehow he held his courage and complained to the tiger, “I took out the thorn from your paw and you are willing to eat me!” The tiger said, “It is my need. I have no other option.” The tiger then killed the man and ate him.
Moral: It is very hard to change one’s inborn nature.