In Nathaniel Hawthorne's "The Scarlet Letter," the quote emphasizes the transformative power of love. It suggests that love, whether it is new or rekindled from a dormant state, brings about an illumination that brightens not just the individual’s heart but also the surrounding environment. This notion highlights the idea that true love generates a sense of joy and warmth that impacts everyone around the person experiencing it.

The imagery of sunshine symbolizes the positive emotions and vitality that love can evoke. When one is filled with such love, it leads to an overflow of happiness and positivity that can dramatically influence the world outside. Thus, love serves as a source of light and energy, suggesting that its essence is not only personal but also extends to the broader community, promoting connectivity and upliftment.