Artists themselves are not confined but their output is.

I am very averse to bringing myself forward in print but as my account will only appear as an appendage to a former production and as it will be confined to such topics as have connection with my authorship alone I can hardly accuse myself of a personal intrusion.

A celibate like the fly in the heart of an apple dwells in a perpetual sweetness but sits alone and is confined and dies in singularity.

We are all sentenced to solitary confinement inside our own skins for life.