Ideal Solitude
The solitary mind is a strong mind, because it knows how to stand still. That doesn’t mean not associating with people at all that would lack loving-kindness
In the Sutta Nipata we find a discourse by the Buddha entitled “The Rhinoceros Horn” in which he compares the one horn of the rhinoceros with the sage’s solitude. The Buddha praises being alone and the refrain to every stanza of the sutta is: “One should wander solitary as a rhinoceros horn.” (K.R. Norman transl. P.T.S.)
There are two kinds of solitude, that of the mind (citta-viveka) and that of the body (kaya-viveka). Everyone is familiar with solitude of the body. We go away and sit by ourselves in a room or cave or tell the people we are living with, that we want to be left alone. People usually like that sort of solitude for short periods.