The most profound idea that can occur to any mind is that of the cyclic nature of time, fate and regeneration. Even though it is evident in scientific things like the first law of thermodynamics and the ultimate and imminent destiny of a cyclic universe, one needs only recognize that their apparent existence implies the intrinsic possibility that their existence, as it is in that instant, is able to recur again and has occurred infinitely many times before as it does in that moment. The permutations of thermodynamic microstates must eventually repeat themselves, creating identical states or systems. This recurrence and successive permutations also suggest a multiverse-like phenomenon where everything is comically “the same but different” trope to a T. It evokes that bit of wisdom, “The world is indeed comic, but the joke is on mankind” from H.P. Lovecraft, a figure of honor, which is the grand summation of fate and return. Every struggle against the human soul is doomed to repeat for all time, a conclusion so spectacular and significant that I believe it is truly capable of making men thoroughly mad.
Personally, I wonder how this wisdom weighs on my humanity. My life and what is essentially myself will recur in an infinite permutation of recursive universes each of an unremitting nightmare-future. I found not many people who understand this or are ready to accept it which makes me feel dry amused at the notion I am profoundly wrong.