The mutual possession of the Ten Worlds means that each of the Ten Worlds contains all ten within itself, bringing the total to 100 worlds. These 100 worlds are 100 different perspectives on life. Each possesses the Ten Factors of life, which brings the total up to 1,000. The mutual possession of the Ten Worlds is possible because the Ten Worlds all possess the Ten Factors in common. These Ten Factors are the ways in which one can analyze the common properties of life in all of the one hundred worlds.

Fundamentally, the Ten Factors show that the 100 worlds are all simply manifestations of the process of Dependent Origination, and therefore are empty of any fixed or independent existence.