Sri Sri Ravi Shankar: Doubt, within a limit, is a sign of intelligence. Beyond a limit, it is a disease. If you have self-doubt, then you can’t do anything. Doubt can clog your intellect like a disease. Also, if you keep on doubting everybody around you, you can’t do business. Business depends on trust. Administration depends on trust. See, if you have a collection in a hotel of Rs. 10,000, you have to send somebody with the money to the bank to deposit it. If you have doubt that the person will run away with the money, then you can’t move an inch in the society. Again, a sincere doubt is good, to awaken you towards knowledge. But beyond limit, it can cause heartaches and drag you backwards. Life should be like when you are in a car; where the windshield is big, you have a side mirror, and a little mirror to see the back. Just imagine if your windshield is as small as the rear mirror, and the rear mirror is as big as your windshield, then you are only seeing the past. You can’t move anywhere. So, you need to know a little bit about the past. Sometimes, you need to look into the rear mirror, and sometimes, you have to look in the side mirror. The windshield is your present, the vision of where you want to go.