Carthusians live in individual cells with their own workshop, study, oratory and garden but eat some meals and pray sometimes in community.
Their entire day is arranged around praying, working, reading and studying for God.
Bruno was a successful administrator, scholar and advisor, but longed for a more private life to which he returned even when repeatedly called out of seclusion by a former student who became pope and needed his advice.
Bruno is shown in this statue declining nomination as a bishop and with a skull to remind him of the fleeting nature of earthly honors and pleasures.
It is a peculiar phenomenon that the very busy often find the advice of the very quiet very valuable.