A person who has not been completely alienated, who has remained sensitive and able to feel, who has not lost the sense of dignity, who is not yet “for sale”, who can still suffer over the suffering of others, who has not acquired fully the having mode of existence - briefly, a person who has remained a person and not become a thing - cannot help feeling lonely, powerless, isolated in present-day society. He cannot help doubting himself and his own convictions, if not his sanity. He cannot help suffering, even though he can experience moments of joy and clarity that are absent in the life of his “normal” contemporaries. Not rarely will he suffer from neurosis that results from the situation of a sane man living in an insane society, rather than that of the more conventional neurosis of a sick man trying to adapt himself to a sick society. In the process of going further in his analysis, i.e. of growing to greater independence and productivity, his neurotic symptoms will cure themselves. […] Paradoxically, the ability to be alone is the condition for the ability to love.
Erich Fromm, The Art of Loving (via 1109-83)