People naturally like to express their happiness towards those who show them a little courtesy or kindness. For example, he would be very happy if a person welcomes him to his home and offers him whatever he likes, especially if the host is a sensitive person who offers whatever is needed before being asked to do so. Similarly, a person who is suffering from a serious illness and who regains his health due to a doctor’s treatment will not know how to thank him appropriately. The same is true for...
