This quote is a profound reflection on the diversity of life and nature, and the subjective nature of experiences and preferences. When Zhuangzi states, "Fish live in water. Men die in it." he’s illustrating how different creatures have different needs and different ways of experiencing the world. What’s beneficial or even necessary for one can be harmful or fatal for another. This is a metaphor for the diversity and relativity of life experiences.

The second part of the quote, "Nature is diverse, and not all tastes are the same," further underscores this idea. Just as different creatures have different needs, different people have different tastes, preferences, and ways of experiencing and interacting with the world. What one person enjoys or values, another may not. This is a testament to the incredible diversity of human experiences and perspectives.

Applied to today’s world, this quote could be seen as a call for tolerance, understanding, and respect for diversity. In a world where people often struggle to understand or accept differences, Zhuangzi’s words remind us that diversity is a fundamental part of nature and human experience. We should not expect or demand that everyone see the world in the same way we do, or have the same preferences or values.

In terms of personal development, this quote suggests that we should be open to different perspectives and experiences, and not judge others based on our own tastes and preferences. It also suggests that we should not feel pressured to conform to others’ expectations or norms, but should instead embrace our own unique tastes, preferences, and ways of experiencing the world. After all, just as fish need water to live, we each have our own unique needs and preferences that are essential to our well-being and happiness.