The Eternals are among the most potent of all ideologues in our universe. Conceived of in the earliest moments of the universe's creation, they are sentient manifestations of primal forces that move the entire universe.
Death represents the death of living things. All life must eventually end.
Infinity is all space and all things. It is the sum of the universe and the expansion and growth.
Eternity is the force of all life. Life gives the universe purpose.
Oblivion is entropy. All things must return to their lowest energy state.