William Blake on Philosophical pessimism

“Every night and every morn Some to misery are born; Every morn and every night Some are born to sweet delight; Some are born to sweet delight, Some are born to endless night.”

“Why does the Raven cry aloud and no eye pities her? Why fall the Sparrow & the Robin in the foodless winter? Faint! shivering they sit on leafless bush, or frozen stone Wearied with seeking food across the snowy waste; the little Heart, cold; and the little tongue consum'd, that once in thoughtless joy Gave songs of gratitude to waving corn fields round their nest. Why howl the Lion & the Wolf? why do they roam abroad? Deluded by summers heat they sport in enormous love And cast their young out to the hungry wilds & sandy desarts”