Some people have a habit of criticising everyone and everything. It is a habit which eventually leads to criticising the Pious, the Ulama, the Sahabah, the Prophets and finally even Allah azzawajal (Naoothubillaah). Following is an anecdote regarding such a person.
A traveller, feeling tired decided to rest under a big tree which bore a small berry type fruit called Bor in the Indian language. His eyes fell on a nearby vine-like plant on the ground bearing huge watermelons. As is the habit of one who constantly criticises, he thought to himself that the fruit on the huge tree was small while on the ground lay a poor little plant with the huge watermelon. It should have been the other way round, with the watermelon on the tree and the small fruits on the ground.
At this thought he sat up straight extremely pleased with himself at this analysis and thought how impressed people would be when he mentioned it. No sooner had the thought crossed his mind when a wind blew and one of the fruits from the tree fell right on to his head! With this his inner eyes opened and he fell into prostration, grateful that it wasnt the huge watermelon which had fallen on his head!
From a speech by Shaykh Muhammad Saleem Dhorat (Hafizahullah)