The quote “By a tranquil mind I mean nothing else than a mind well ordered” suggests that tranquility or peace of mind is not attained by the absence of problems or worries, but rather by the ability to arrange and manage them in an orderly manner. It implies that a tranquil mind is not a blank or empty one, but one that is well-organized and disciplined.

The concept of a “well-ordered” mind might include the ability to prioritize tasks and concerns, to focus on one thing at a time, and to let go of worries that are beyond one’s control. It could also imply a mind that is not easily swayed by emotions, but remains steady and rational in the face of challenges.

In today’s fast-paced and highly stressful world, this idea is more relevant than ever. Many people struggle with anxiety and overwhelm due to the sheer volume of tasks, responsibilities, and worries they’re dealing with. Applying this concept could involve practices such as mindfulness, which helps bring attention back to the present moment and away from unproductive worries about the future or the past. It could also involve cognitive techniques to challenge and reframe negative thoughts, or lifestyle changes to reduce sources of stress and create more order and routine.

In terms of personal development, cultivating a well-ordered mind can lead to increased resilience, better decision-making, and improved mental health. It’s about developing the mental discipline to choose where to direct your attention and energy, rather than being constantly pulled in different directions by external demands or internal worries. This can also enhance productivity and effectiveness in various areas of life, from work to relationships.

Thus, a tranquil mind as defined in this quote is not about escaping from reality, but about engaging with it in a more structured, focused, and constructive way. It’s about finding peace not in the absence of challenges, but in the ability to handle them with clarity and composure.