Purpose of God's Creating this Universe
The life duration of the sun is said to be about 10 billion years, although it has existed for about 4.5 billion years so far.
But it does not mean that the earth can exist with living things for 5.5 billion years more, because the sun will become inflated as time goes by. The sun will get larger so as for its surface to reach the earth's orbit around the sun. It is expected that 1.75 billion years later the earth will be scorched due to the heat of the sun. As the sun increases its volume, the heat from the sun growing larger will heat the earth so that all the living things on the earth will die down.
However, men might exit the earth to find another solar system and another sun suitable to live in, since there is the time of 1.75 billion years to prepare the exit from the earth and this solar system.
Today science tells that the earth has existed for about 4.5 billion years, although it has been only 1.8 million years since the species where human beings belong Homo sapiens was established. And it has been only 250,000 years since human beings started to speak. So, we had better worry about the future of the mankind in, say, 10,000 years or so. But who can imagine the status of the mankind 10,000 years later or even 2,000 years later?
In this context, the belief that God appeared to Abraham 4,000 years ago and Moses 3,500 years ago, that the Son of God appeared to Jewish people 2,000 years ago, and even that an Angel gave words of God to Mohammed 1,300 years ago is important, since it is God who created this universe. If the purpose of God's creating this universe is to create human beings who worship God, this purpose might be said to have been almost satisfied. But why does God intend to create such human beings as worship Him, even if it has taken billions of years? (For example, the age of the whole universe is 13.8 billion years.)
Is this is the most significant question for any intellectual species in this universe? It is so since we cannot find any other reasons for God's creation of this universe. It is also unthinkable that the human beings without faith in God, the Creator of this universe, can survive in the next 2,000 years, 10,000 years, or 1.75 billion years.
Anyway, no matter what the mankind will be, the earth will be scorched by the inflating sun in 1.75 billion years. And, 5.5 billion years later, there will be no sun and no earth. But God exists forever with or without the surviving mankind. This is the root of the feeling of impermanence in human lives and thoughts. Without faith in God, we cannot even sustain a sane state of our minds.
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Mar 5:13 And forthwith Jesus gave them leave. And the unclean spirits went out, and entered into the swine: and the herd ran violently down a steep place into the sea, (they were about two thousand;) and were choked in the sea.