A great many wise sayings have been uttered about the effects of solitary retirement; but the motives which impel men to seek it are not more various than the effects which it produces on different individuals. One thing is certain, that those who can with truth affirm that they are "never less alone than when alone," might generally add that they never feel more lonely than when not alone.

Thoughts in the Cloister and the Crowd (ed. 1883)