A shade

Those eyes, which were already surrounded by tiny wrinkles, had begun to betray a worn-out man of doubtful morals, a duplicity, an ever-increasing irony and another shade of feeling, which was new: a shade of sadness and of pain—a sort of absent-minded sadness as though about nothing in particular and yet acute.

    --from Fyodor Dostoevsky's short story, "The Eternal Husband"