Arthur Schopenhauer Quote

The deep pain that is felt
at the death of every friendly soul
arises from the feeling that there is
in every individual something
which is inexpressible,
peculiar to him alone,
and is, therefore,
absolutely and irretrievably lost.

Parerga and Paralipomena: Short Philosophical Essays (ed. Oxford University Press, 1974) - ISBN: 9780199242214