According to Bhagavad-gita, a soul is situated in each living body just as a driver is situated in an automobile. The driver is different from his car, although he directs its movements. Similarly, the jiva soul, although doggedly trying to enjoy a body made of the material elements, is separate from it. Each kind of body—from the microbe to the human being—affords the soul a particular kind of sense enjoyment, a different means for trying to satisfy his godless longings. Evolution, for example, was understood thousands of years ago to mean that the paramatma within all species is constantly making the souls within them happy and so many living entities desire so many unlimited things; when creatures desire, Krishna manifests it. Of all the billions and billions of life forms within the universe, it is understood that the human form of life is the most highly desired, as it is in this form you can regain your eternal identity. There are an infinite number of entities living in different dimensions within every universe and Krishna only appears on earth like planets – love versus fear – as this is frequency specific to bring forth the presence of an avatar of the Supreme. Krishna doesn’t appear in the higher realms as inter-dimensional beings (Demigods) are too centered on enjoying His opulent energy and some are trying to lord it over the material creation. He doesn’t go to the lower worlds below earth because there is too much suffering for souls there to contemplate divinity. According to this ancient text, the trillions of universes that exist comprise 1/4 of Krishnas energy. The other 3/4s constitute the spiritual world made of Sat-Chit-Ananda (eternity/bliss/knowledge). Within each manifested universe a “Brahma” engineers and manages each universe and hence not one universe is the same. He is the first created entity within the universe. The Supreme Person Krishna, in His role as Vishnu, creates the material world. He then empowers a Brahma to act as the engineer and manager within each universe. Of all the demigods in charge of generating various species of life and managing universal affairs, Brahma is the chief. Brahma is also the original spiritual mentor of everyone within the universe.