There are many who believe in heaven and there are some who believe in heaven on earth. The following is from the Tip of the Writing Brush:
Step by step, I am solely making preparations to save the whole world. 4-36
After that, you may stay as long as you wish, without illness, death, or weakening. 4-37
Further, after the passage of long years, there will be no aging at all. 4-38
This is paradise on earth. According to the sacred book, there is a prerequisite for this paradise on earth. All mankind must sweep evils (greed, arrogance, and self love) from their minds. If you think about it, who would want to live forever if these conditions were not met?