You Must Understand Yourself
We understand many things about this world, but we don't understand ourselves. So why do human beings come into this world? Why do we live in this world? For love? For money? For respect or fame? Do you live for your wife, husband, or children? Why do you live in this world? If someone asked you these questions, you might very well answer. "I live for my children. I live to earn enough money for them, or maybe just to have a good life." Most people think like this. They live only for their family, for some fleeting social respectability, perhaps to enjoy art or to get some powerful position.
Everyone wants to have a good situation for themselves. If you look at this world very closely, it is easy to see that most people eat and sleep and live merely for their own happiness. Yet these things are not the real purpose of human beings' life. They are just temporary means for living in the world. If human beings cannot find out who they are, how can they ever truly be happy?