Dr Mishra of Apollo Hospital said this, which I quite liked. You take a piece of paper and write down, on one side, what society has done for you. Then turn the page and write on the other side what you have done for society. You will find, invariably, that your contribution falls short. We receive more from society than what we will ever give in this life. You can't always be thinking of recovering investments, especially in terms of education. The patients on whom we learnt and trained — in a way, we are more indebted to them than they are to us. Somebody else does the research, somebody else does the marketing and we hand it over to the patient. It's a postman's job. So we need to be essentially humble.