“Of all creatures, only man is capable of loneliness because only he is in need of not being alone, without being able in the end to escape being alone. It is that striving to escape his loneliness which gives the impetus to both the lust for power and the longing for love, and it is the inability to escape that loneliness, either at all or for more than a moment, that creates the tension between longing and lack of achievement, which is the tragedy of both power and love.
In that existential loneliness man’s insufficiency manifests itself. He cannot fulfill himself, he cannot become what he is destined to be, by his own effort, in isolation from other beings. The awareness of that insufficiency drives him on in search of love and power. It drives him on to seek the extension of his self in offspring—the work of his body; in the manufacture of material things—the work of his hands; in philosophy and scholarship—the work of his mind; in art and literature—the work of his imagination; in religion—the work of his pure longing toward transcendence.” Hans Morgenthau