The Red and the Black
Stendhal
the discovery, in prison, that he was happy only when he did not calculate, in chapters 31 to 45 of Book II.
White Nights
Fyodor Mikhailovich Dostoevsky
the epigraph and the happy "until tomorrow" (First Night), the new dream that is new happiness (Second Night), the fever of joy after the opera (Nastenka's story, Second Night), Nastenka's happy wait (Third Night), the plans for a life in common (Fourth Night), and the minute of bliss (Morning).