Seneca,
Moral letters to Lucilius — Letter 99…
“ When the first news of some bitter loss has shocked us, when we embrace the form that will soon pass from our arms to the funeral flames – then tears are wrung from us by the necessity of Nature, and the life-force, smitten by the stroke of grief, shakes both the whole body, and the eyes also, from which it presses out and causes to flow the moisture that lies within. 19. Tears like these fall by a forcing-out process, against our will; but different are the tears which we allow to escape when we muse in memory upon those whom we have lost. ”
