This quote is an analogy comparing the cultivation of thoughts to the growth of crops. Just as a seed must be planted and nurtured to yield a harvest, Thoreau suggests that character must be developed and nurtured to yield profound thoughts.

The "seedtime of character" refers to the time and effort invested in building character. This includes nurturing virtues such as honesty, courage, compassion, generosity, fidelity, integrity, fairness, self-control, and prudence. Just as a farmer must prepare the soil, plant the seeds, and tend to the crops regularly, an individual must also cultivate these virtues consistently.

The "harvest of thought" represents the output or the result of having a well-formed character. Thoroughly developed character leads to profound, meaningful, and impactful thoughts. Just like a bountiful harvest is the result of a well-tended crop, rich thoughts are the result of a well-cultivated character.

In today’s world, this quote can be applied in many ways. In terms of personal development, it suggests that if we want to have meaningful insights and valuable ideas, we must first focus on developing our character. This includes working on our virtues, values, and ethics. The stronger our character, the more profound our thoughts and ideas will be.

In a broader societal context, it can be seen as a comment on the importance of character education. In a time where we often prioritize knowledge and skills, Thoreau’s quote serves as a reminder that character development is equally, if not more, important. It is the foundation upon which all other learning and development are built. Without a strong character, our thoughts and actions may lack depth, meaning, and impact.

In conclusion, Thoreau’s quote emphasizes the importance of character building as a prerequisite for profound thought. It serves as a reminder that personal development is not just about gaining knowledge or skills, but also about nurturing our character.