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.
One popular Murim novel is 'The Legend of the Northern Blade'. It has a great story filled with martial arts, honor, and a hero's journey. The main character overcomes numerous challenges in the Murim world.
'Second Life Ranker' is also quite popular. It has a unique take on the murim concept where the main character gets a second chance at life in a different world full of martial arts and power struggles.
'Peerless Dad' is a great Murim novel. It has a different take on the Murim genre as it focuses on a father's journey in the Murim world. It's filled with humor, heartwarming family moments along with the typical Murim action and intrigue. The characters are well - fleshed out and the plot keeps you hooked from start to finish.