inwardly, pensively, introspectively, intellectually, subjectively, thoughtfully, theoretically.
He is in good health, and apparently mentally
He made no complaints- he realized that he was on the wheel, and must cling how and as he might, but he shrank mentally
at every proposition that he should leave his room.
As he thoroughly realised this for a moment he was shocked at himself, recoiled mentally
from his own feeling.