Compared with spirit world, Earth is but a speck of dust. The spirit world is an eternal world, transcending time and space. If a spirit person commands, “The person who lived in such and such an age with such and such a heart, please come forward”, then that person will appear in an instant. It is a world in which feelings and intuition turn into reality. There are no factories there to produce food. There are no auto-mobile factories. There is nothing like that. To register yourself in spirit world, you need a certificate based upon your life on Earth. How are you going to obtain it? I’m talking about a certificate of life that will let you say: “This is what I became. This is what I did.” You cannot just make your own certificate. First, Satan has to write one for you. After you receive that certificate, you have to receive one from Jesus. Finally, you have to receive a certificate from God. You will need these three certificates. When you go to spirit world, you will find that it is made up of three very large realms. Those who lived for others will go to the highest level. Those who lived for themselves, however, will find themselves on the lowest level. They will find that everyone is opposing them, whereas everyone will welcome those who lived for others. Once you are in spirit world, your parents and spouse cannot help you. The people in the highest levels are those who lived for the sake of others. In the uppermost tiers are those who travelled throughout the world living for others with a heart that expanded their love for their mother and family. With a saintly heart, they always are looking for ways to save the people of the world from evil. The one who lives for himself goes to Hell and the one who lives for others goes to Heaven. People separate into these two worlds at death. So, we must live for the sake of the whole, for the sake of the greater good. Live for the sake of the world, for the sake of God and for the sake of human liberation. Someday competitions will take place to see who can live for the sake of others to a greater degree. In the heavenly world, the person who has lived for the sake of others will go to the higher position. So you can leap to a higher position by living for the person who is higher than you are. Living for that person is the same act as God bringing forth His own object through His creative act. Thus, that person comes to stand as your object partner of love.
(from the book: Sermons of Reverend Sun Myung Moon)