The Will to Power and Eternal RecurrenceThroughout the 1880s, in his notebooks, Nietzsche also developed an equally elusive theory of the “eternal recurrence of the same” and much speculation on the physical possibility of this idea and the mechanics of its actualization recur in his later notebooks. Here, the will to power as a potential physics is integrated with the postulated eternal recurrence. Taken literally as a theory for how things are, Nietzsche appears to imagine a physical universe of perpetual struggle and force that repeatedly completes its cycle and returns to the beginning.
However such a concept of eternal return was used metaphorically, and evidenced for not being taken as a literal theorem of Nietzsche for how in fact things are or aren't, by how he claimed it as a most "abysmal" of convictions amongst human values. Wherein he posed as a question to whether the eternal recurrence could be accepted by one that such would justify that one's life beyond their valuation (a trans-valuation) and be a necessary thought-experiment precursor to the overman in their perfect acceptance of all that is, for the love of life itself and amor fati.