Everything in our Universe exists along a continuium, a Great Chain extending from the largest objects imaginable to the smallest. Everything in the Universe, matter, energy, time, and space interact with everything in their immediate environment. Meaningful interactions, however, can only occur between objects on a closely related levels of existence. The Great Chain is a continuium encompassing everything. Atoms, Molecules, People, Planets, Stars, Galaxies, Superclusters of Galaxies all exist on completely distinct levels of existence, and generally speaking, objects can only meaningfully relate with objects on closely related levels of existence.
Humans occupy and are only capable of interacting with a tiny portion of this continuium. We as humans are only really capable of meaningful interactions with those levels of existence that fall within the range our our experiential existence. Our associational range extends only a few levels above and below our own level of existence. While we may be dimly aware of interactions on the levels above and below our own levels of experiential existence, we are incapable of meaningful interactions, because the existential association is simply too attenuated.
Imagine a single hydrogen atom. A hydrogen atom has one proton and one electron. When an atom of hydrogen encounters an atom of oxygen and another hydrogen atom, the three atoms will bond, forming a molecule of water. The hydrogen atom can meaningfully associate with the other atoms because the three atoms exist on the same associational level. By the same token, those three atoms forming that molecule of water can meaningfully associate with another atom or another molecule of water because the physical interactions at play (the strong and weak nuclear forces) still dominate their associations. All of these interactions are meaningful because they all take place within closely related associational levels.
Place that same hydrogen atom at the level of a human being. The period at the end of this sentence could contain 20,000,000,000,000 of those same hydrogen atoms that were able to meaningfully associate with other atoms. Yet even 20,000,000,000,000 of them put together are scarcely noticeable on our level of existence. Even that molecule of water formed from the meaningful association of hydrogen and oxygen simply does not register on our level of existence. Indeed, 602,000,000,000,000,000,000,000 of those same water molecules constitute less than a teaspoon of water.
Going further, place that same atom of hydrogen on the level of a star. Our sun converts approximately 3,700,000,000,000,000,000,000,000,000,000,000,000,000 hydrogen atoms into helium via nuclear fusion every single second. On this scale a single hydrogen atom is completely and utterly meaningless because the unimaginable gulf between the levels of association is simply to vast. Even on this level of existence the cosmic and numerical insignificance of an atom of hydrogen is simply incomprehensible.
As the Atheist begins to understand the true scope and scale of the Universe, it becomes inescapably clear that even if our Universe was created as an intentional act of authorship, that there is an incomprehensibly gargantuan gulf between our level of existence and that of the Creator of the Great All. Indeed, the associational gulf is so vast that it borders on lunacy to believe that such a being, even assuming that it exists, has any interest whatsoever in anything as mundane, transitory and unimportant as our entire galaxy, let alone our humble planet and its collection of clever primates.
We are utterly irrelevant in a cosmic sense.
To illustrate just how irrelevant, it is useful to analyze the levels of existence comprising the Great Chain. To understand our place on it and view the gulf between the level on which Creator of the Great All dwells and our own level of existence.