There are so many that slip my mind. Some memorable quotes/scenes:
Jiang Cheng, about public opinion: “Wei WuXian! Don’t you understand? When you’re standing on their side, you’re the bizarre genius, the miraculous hero, the force of the rebellion, the flower that blooms alone. But the second your voice differs from theirs, you’ve lost your mind, you’ve ignored morality, you’ve walked the crooked path. You think you can be immune to all those condemnations as you stay outside of the world and do whatever you want? No such precedent has happened before!”
When Wei WuXian tries to teach Jin Ling about two very important words, "Thank You" and "I'm sorry".
Near the end, Jiang Cheng's pain, and his interactions with Wei Ying, "Didn't you say you can control it?" "You promised, GusuLan has the two Jades, JunmengJiang will have their two Prides!"... Well, all their dialogue in the final episodes, and Wei Ying's genuine regrets, at last admitting he was at fault..
WangXian finally realising they are in the same page regarding right & wrong, being pure & persistent on your beliefs, despite what the outside voices may say!
Lan Zhan (by extend) confirming that he'll always stand by Wei Ying's side, "That feeling, crossing the single-log bridge in the dark, is not so bad after all!"
Sorry for any inconsistencies, I don't remember the scenes 100% (need another rewatch, lol)