There are two sides in this life. One side is the material world, the other side is the spiritual world. It's not enough if we only busy ourselves in the material world. We will come back later and it will be the same suffering and happiness. We keep coming and going, trapped inside the prison. There is nothing truly meaningful. Sometimes, we have to suffer a lot before we realize this, realize the most important point, realize that we are really bound by these rules, or by our mind. These things are really useless. People who haven't suffered are less likely to understand. Those who have suffered will understand, because they will cherish the human body, which is too precious and too fleeting. When I talk to you, I have to laugh. But if I'm trapped in a situation, it's also quite agonizing. While suffering, I also realize that it is actually nothing. The world is nothing but an illusion. So, when we are in deep samadhi, the whole world vanishes, even our own person vanishes. The numerous illusions of sentient beings life after life, have manifested into this or that. As the Diamond Sutra stated, "Be free of all attachments, so that your mind will be free."