*And the peace of God, which surpasses all understanding, will guard your hearts and your ...

*And the peace of God, which surpasses all understanding, will guard your hearts and your minds in Christ Jesus. Philippians 4:7*
Peace of God, according to the Bible, is a state of absolute tranquility derived from the belief one is in God's peace, in God's mercy, and therefore, in His trust. This peace brings holeness and divine unity, completedness if you will. It's that unshakeable peace amidst stormy unpredictability; stoicism describes it, metaphorically, as the rock withstanding the wrath of the ocean waves (German: 'Fels in der Brandung'). The Bible describes it as knowing and differentiating between what one can change, and what one cannot (implicating anything one cannot influence should be entrusted in God's hands/divine metaphysics). Furthermore, it's about finding peace and stability (within one's self) precisely in moments outside of one's control, and trusting your own self and what lays within one's influence.
To circle back to the completedness portion, let's bring K. Gustav Jung into this, for the fun of it. His model of consciousness and the unconscious suggests one can find peace when they integrate (the process of integration isn't forced, and it has to be conscious) their Shadow. The Shadow is that part of the (individual) unconscious that contains repressed desires, fear, aims for self-actualition, etc. The more repressed the Shadow is, the more so called complexes (models of the mind that make it so you function through one dimensional feeling and thinking rather than incorporating your whole, multi dimensionalself) arise and can take over the conscious. The conscious contains the Ego and the Persona. The Persona is the outward self expression, our social mask if you will. It wants to curate everything, it's a total opposite of the Shadow in its unapologetic desires.
Boxer guy functions mostly through his Shadow (although not fully incorporated as he, too, is coping, and isn't conscious enough of it). Incheol mainly functions through his Persona and complexes. He people pleases (he's very hierarchy conscious in his people pleasing), he wants to be everywhere at the same time, represses his mental and physical well being (overworking himself, overdosing caffeine), he's bound to very societal, external validators to success. His path to self actualization is very externally focused and driven, where as boxer guy's path to self actualization is very self serving and internally focused (kinks, desires, physical senses, pain, sadomasochism, etc.). Incheol is all in his rationale and head, boxer guy succumbs to primal urges and experiences. This constellation screams mirroring of complexes - repression and expression, Shadow and Persona, desire and discipline. Incheol is disrupted in his connection to his own Shadow, so seeing how boxer guy melts in, and is free in deriving pleasure from pain disgusts him (and the fact he's not yet explored sexuality with men). See, freedom, peace. Boxer guy finds peace in total annihilation and disruption. One could say there is something very 'sick' about this, like a coping mechanism or trauma. Some suggested the movie posters and movie plots might hint at that. What they, in my opinion hint at as well- most movies end up with some sort of grande unraveling, break down, everything falls apart and is gone... Which gives possibility for peace. Nirvana. One who has nothing is free. (Fight Club incoming lol). Incheol and Boxer Guy might very well destroy each other. Not just in a physical way, it might transcend that. They might destroy their own self perceived images of who they are and what they want. Boxer Guy is drawn to a repressed man who serves the political repression of the working class through gentrification and what not. Incheol will inevitably, through his strive for success at all cost, be drawn to a man who's so free in living his desires he's experiencing literal neurodegenerative disease because of it. Exploring each other means the collision of two worlds, two systems that either serve each other or destroy each other to bring emptiness - Peace of God. In a less Biblical and more, hm, Eastern Asian philosophical sense, in emptiness there is wholeness. What isn't missing isn't gone. Free from the Persona, free from even the urges of the Shadow. Acceptance in things inevitably being gone, over, and changing.
Interpretation over, I wanna see gay sex now.