Emily Brontë compares love to a wild rose-briar, suggesting it is passionate, free-spirited, and beautiful, yet possibly fleeting or delicate. Friendship is likened to a holly-tree, symbolizing strength, resilience, and steadiness through all seasons. The imagery highlights the contrasting qualities of love and friendship, emphasizing that each serves a unique and vital role in life.
She notes that the holly is dark when the rose-briar blooms, implying that friendship provides support during times when love's passion might fade. Brontë questions which of the two will be more constant, suggesting that while love is passionate, true friendship may endure longer and offer more stability over time.