This quote is suggesting that knowledge is a fleeting entity, not something static or permanent. It changes, evolves, and sometimes even disappears into the fog of forgetfulness or obscurity, much like an echo that gradually fades away until it’s barely heard or understood. It reflects the transient nature of knowledge and the constant need for its renewal and reinforcement.

The first part, “Knowledge is soon changed,” implies that what we know or understand about the world is constantly altering. This could be due to new discoveries, new perspectives, or simply the passage of time that brings changes. It’s a reminder that we should always be open to learning and adapting our understanding.

The second part, “then lost in the mist,” suggests that knowledge can easily be forgotten or lost if not reinforced or utilized. Knowledge, like an echo, can fade away into the background noise of life if not actively maintained.

In today’s fast-paced world, this quote is highly relevant. The rapid advancements in technology, science, and society demand that we continuously update our knowledge to stay relevant. It also highlights the importance of lifelong learning, as the knowledge we acquired years ago may have evolved or changed.

In terms of personal development, the quote encourages us to keep learning and growing. It reminds us not to be complacent with what we know, but to continuously seek new knowledge, broaden our perspectives, and reinforce our understanding. It also emphasizes the importance of applying our knowledge, as unused knowledge might be forgotten, like an echo half-heard.