Summary
This quote suggests that while someone has the ability to make a situation or mood negative or "dark," the speaker lacks the power to make it positive or "light." It could be implying the asymmetry of influence or control, indicating that one person has more authority to make things worse, but lacks the ability to improve the situation. This quote may express a sense of frustration or powerlessness on behalf of the speaker and the contrast in their control over the atmosphere.
By Jodi Picoult