Well, farewell, Bao Qian. It was good knowing you while it lasted.
Anyway, I'm leaning more towards option 1.
I don't really like how option 2 seems to shift the blame of Isolation entirely into the self alone. While that may be true for people like Yan Renshu, a lot of the time Isolation is forced into people against their will. And all of their attempts to reach out to others are refuted and scorned at.
I understand that option 2 doesn't state one's own attitude is the only source of Isolation, but the "the greates for is I" bit certainly puts the focus on it.
I feel that highlighting the pain that Isolation can cause fits better with Ling Qi's experiences and understanding of the concept.
I also don't want to entirely shed the "a person only has two hands but others have two hands as well" of the previous version of the concept. That's the part that got Huiseng's attention back on LQ's breakthrough, and I really dig it.
"The blade Isolation cannot be dulled by one heart alone" also draws better on the importance that LQ places on her personal bonds.
Overall, option 1 sounds a lot more "Ling Qi" to me.
[X] As starvation is privation of the body, isolation is privation of the soul. From lack and loss is born suffering, in many forms. One soul has but two hands, yet in multitude the chain is unending. The blade Isolation cannot be dulled by one heart alone.