Giving witness by being alone

"Making Him who is the exclusive center of our lives through our Profession, we testify to a world, excessively absorbed in earthly things, that there is no God but Him.

"Our life clearly shows that something of the joys of heaven is present already here below; it prefigures our risen state and anticipates in a manner the final renewal of the world."
Statutes of the Carthusian Order
Book 4, Chapter 34, number 3

"For the solitudinarians, being such a witness is not realized by speech nor by personal contact.

"By his mere presence,
the monk is a witness
that God lives
and can take over the hearts of men."
(From the Carthusian website)