Arthur Schopenhauer,
The World as Will and Representation…
“ This is also the place to explain one of the most striking peculiarities of human nature, weeping, which, like laughter, belongs to those qualities which distinguish man from the brutes. Weeping is by no means a direct expression of pain, for it occurs where there is very little pain. In my opinion, indeed, we never weep directly on account of the pain we experience, but always merely on account of its repetition in reflection. ”
