This quote is a metaphor that can be interpreted in a couple of ways. On a literal level, it refers to the concept of contrast in visual arts, where a brightly lit object stands out more when placed against a darker background. However, the deeper, metaphorical meaning is what makes this quote truly profound.

The luminous body can be seen as a symbol for a person or an idea that shines brightly with positivity, talent, or innovation. The deeper shadow represents the challenges, difficulties, or negativity that surrounds it. The quote suggests that the brilliance of the person or idea becomes more noticeable and appreciated when juxtaposed with these hardships. In other words, our strengths and virtues often shine brightest against the backdrop of adversity.

Applying this concept to personal development, it suggests that our true potential often comes to light in challenging situations. When we face obstacles and adversities, our resilience, determination, and inner strength are brought to the forefront. This is when we truly shine and grow as individuals.

In the context of today’s world, this quote could be applied to how societies and individuals are dealing with global challenges such as the COVID-19 pandemic. Amidst the crisis, there have been countless instances of resilience, innovation, and compassion that have shone brightly against the backdrop of the pandemic’s darkness.

Similarly, in the realm of social issues, voices advocating for change often stand out more starkly against the backdrop of societal injustices. The "deeper shadow" of these issues serves to highlight the importance and urgency of the luminous body – the call for change.

In essence, this quote is a reminder that challenges and difficulties can serve as a contrasting backdrop that brings out our best qualities and drives societal progress.