Things feels so fun and easy because I feel so great and healthy.

Ease is measured in friction you stop noticing.

During a bad stretch, a shower is a project with stages. Later it is just a shower, and the day it stopped being a project went past without comment.

Fun tends to come back before permission does. People report feeling oddly guilty the first time they laugh properly again, as though enjoying an afternoon were a claim they hadn't earned.

It isn't a claim. Laughing is not a report on your prognosis, and enjoying a Tuesday commits you to nothing whatsoever about Wednesday.