What is it called when there is a difference between what one expects to happen and what actually happens

Read this line from the poem. without the hell, the heav'n of joy. how do the images of hell and heaven in this line affect the meaning of the poem? a. they are reminders that love is a strong emotion. b.they show how the speaker of the poem has suffered emotionally. c.they refer to the emotional depths and heights of romantic relationships. d. they imply that the speaker is deeply religious