Have you ever felt alone despite being surrounded by your family, your friends, in a crowd? That’s what’s called existential or spiritual loneliness.
It’s my conviction that we are all essentially lonely: we are individuals with our own environment, we can never completely become one with others, we are physically separated from others and we live with our own thoughts. Moreover, every person is a unique person and also a solitary creature.
"Existential loneliness is the feeling of an unbridgeable gap between yourself and others, between yourself and the world. It has nothing to do with social loneliness and can therefore not be solved by, for example, more social contacts ..."