Final answer:
The phrase 'Parting is such sweet sorrow' expresses the bittersweet feeling of leaving loved ones, indicating sadness because of separation and sweetness in the hope of reuniting.
Step-by-step explanation:
The line 'Parting is such sweet sorrow' encapsulates the complex emotions one feels when saying goodbye to someone they love, knowing the absence will be felt deeply yet the anticipation of reuniting is sweet.
The phrase, which originates from Shakespeare's play 'Romeo and Juliet,' suggests that the pain of separation is tempered by the sweetness of future meetings.
Across literature, the theme of separation evokes a range of emotions, often capturing sorrow, longing, and the beauty found in the pain of love.