This quote speaks to the idea of accepting people and things as they are, without judgement or preconceived notions. It suggests the liberating experience of perceiving reality in its raw, unfiltered form, without the lens of prejudice, bias, or expectation. The quote promotes the idea of living in the moment, appreciating the present for what it is, rather than what we want it to be or what we fear it might become.

The "sweetness" Thoreau refers to could be the peace and clarity that comes from such acceptance. It’s about releasing the mental and emotional burden that comes with constantly evaluating, judging, and trying to control or change the world around us. It’s about embracing the beauty of the world in its imperfect, transient state.

In today’s world, this idea is highly relevant. We live in a time of rapid change and uncertainty, where people and situations are often not what they appear to be. Social media, for instance, often presents a skewed, idealized version of reality that can lead to unrealistic expectations and dissatisfaction. Thoreau’s quote reminds us to take a step back, to appreciate the world and the people in it for what they truly are, not what they seem to be or what we want them to be.

In terms of personal development, this quote could be seen as a call for mindfulness, a psychological process of bringing one’s attention to experiences occurring in the present moment. By treating men and things for just what they are, we can develop a more grounded, realistic understanding of the world, which in turn can lead to greater emotional intelligence, empathy, and resilience. It encourages us to embrace the reality of our lives, to find peace in the present, and to let go of the stress and anxiety that comes with trying to control the uncontrollable.