Read the text below and answer the question!

Once upon a time, there was a monkey called Ram. He lived on a big mango tree near the lake. The tree had the sweetest mangoes. growing on it. Near the tree lived a crocodile with his wife. The crocodile called Karo, and Ram become friends. Sometimes, Ram used to throw Karo some Sweet mangoes for himself and his wife. One day Karo’s wife told him the monkey ate some such sweet fruit every day, he must be having the sweetest heart. Get his heart for me, dear husband! “ I cannot, he is my friend, replied Karo, “ That means you do not love me, cried the wife. So sadly, Karo went to Ram the next day. Ram, please come to my house, I want you to meet my wife. “ My friend, how can I come? I live on the land and you in the water,’ answer Ram. Don’t worry, my friend, just sit on my back and I shall carry you, “ Karo cunningly offered him. The poor monkey sat jumped on his friend's back and off they went. Ram, was having a lot of fun when he saw that Karo was very sad and quiet. The monkey asked, Why are you so quiet my friend? Karo replied. Because your life is short. My wife wants to eat your heart and that is why we’re going to her. Ram was shocked but could not run. He came up with a plan in his mind and said, Why did you tell me before? I always leave my heart in the tree when I go out. “ Oh, no." cried Karo. “Now, what can we do?“. Let’s go back and take it, said the clever monkey. So the foolish Karo turn around and swam for the mango tree. As soon as Ram could rich a tree branch, he swung up into the tree to safety. He laughed down at the crocodile, How can I live without my heart! Go! Tell your greedy wife how foolish you are !” From that day, Karo didn’t only lose a friend but the delicious mangoes as well.

What is the moral value implied in the story?