Murim in manhwa refers to a fictional martial arts world or community. It's a setting where characters engage in various martial arts battles and adventures.
I don't know exactly who said it. It could have been a protagonist who came to this realization after going through a series of challenges and learning lessons about the futility of revenge.
One reason it stands out is the detailed world-building and the unexpected turns in the plot. Also, the character development is really well done, making you root for the protagonist throughout the story.
The main character is usually the protagonist who experiences the leveling up in the Murim world. However, without reading it thoroughly, it's hard to name all of them specifically.
You can also check out some forums dedicated to light novels. There might be fans who are sharing their own translations or at least guiding you to reliable sources for reading 'Infinite Leveling Murim' in translated form.
There were many novels of this type that could be referred to as the following popular ones:
1. Revenge of Rebirth in the End of the World
2 " Rebirth: Saving the World "
3." Rebirth: Saving Boyfriend "
4. Survivors Reborn in the End of the World
[Rebirth: Revenge Plan]
The novel " Revenge of Rebirth in the End of the World " was a story that met the requirements. It told the story of the protagonist, Chu Yunfei, who was framed to death before the end of the world. After he was reborn, he began his path of revenge.
If you have any other requests, let me know. I will try my best to provide you with better novel recommendations.