Ignorance is the root cause of all suffering. We tend to forget the physical suffering but not the emotional disturbances. We carry these sufferings with us. For what!! Did we bring these sufferings with us to the earth? No, we collected them from here with our ignorance.The main reason for suffering is attachment. Attachment to wealth, position, people…When you do your duties, you will be rewarded. And you have every right to enjoy the fruit of your work. But after a while you will have to leave these rewards and walk forward. This is the law of nature. Nothing is constant. Every thing has to undergo change. But unfortunately, we humans hate change. We are ready to change, if we are offered more wealth, high position etc. But we are not ready to leave the fruits that we have reaped from here. This is against nature. The end result of desisting change is nothing but suffering.