Speaking of Classics, here is a quote from a great one:
The cradle rocks above an abyss, and common sense tells us that our existence is but a brief crack of light between two eternities of darkness. Although the two are identical twins, man, as a rule, views the prenatal abyss with more calm than the one he is heading for (at some forty-five hundred heartbeats an hour). {Opening paragraph of Vladimir Nabokov’s autobiography Speak Memory}

Dark poetry no?