Second, what to do: the substance you refer to has at least the following meanings: 1, balancing human development. 2. Support human survival. 3. It is also very important that being born in these material desires can test whether people can let go of their attachment to these material desires, and the process of gradually letting go is also the process of returning to life. Go back to the place where our life originally originated.
Third, what is the way we pursue: billions of human lives, animals and plants. What is alive at the same time does not necessarily come from the high-level world, that is to say, it is impossible for each celestial body to send a god to spend the lives of other celestial bodies. That is, the road that can take us back, that is, the road we pursue. What needs to be explained here is that the orientals are under the control of the eastern gods, while the westerners are under the care and guidance of the western gods. In other words, it is useless for orientals to believe in western religions (Christians will certainly not believe me, but I will say it anyway. )
I don't understand what you're asking.
5. The enlightenment of Buddha Sakyamuni is the Buddhism he realized before he came, such as that level of Buddhism. Any god who comes to the world to measure people and preach dharma must practice to enlightenment like ordinary people, because what he left behind is nothing more than a "road" to get out of reincarnation, birth and death, and to get rid of suffering forever. With his departure, it is easier for his disciples to understand what to do. His methods are abstinence, determination and wisdom.
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As for your supplementary question, where do we come from? As you said, perhaps our life has experienced trillions of years of history, and it is constantly reincarnation in the world or at other levels. In the whole process, whether it is good or evil, what has accumulated good has also accumulated evil. The joys, sorrows, successes and difficulties in life are all experiences in this life caused by good deeds or evil deeds done by the frontier. So how did people get here? In a high-level realm where our life was originally born, with the long development of time, there are social activities between life in the high-level realm, especially in the higher realm. The understanding of time is different from that of human beings, or the concept of no time, that is, in such a long life without time, selfishness may occur, even a little selfishness. If it does, it is no longer worthy to live in that realm. Just as we watch Journey to the West, Pig Bajie was exiled to the world. And in the lower realm for a long time, maybe the selfishness is a little bigger, then this life will have to go on, so I will go to the lower realm and space ... and so on, I will enter the three realms one after another, and finally come to the realm of the world. That's how people come.
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What I have learned from personal practice does not represent the final and most correct answer to your question. For reference only. It's impolite, because I'm just a yogi, and it's impossible for me to say things perfectly. You got it? For reference only! !