This much then, is clear: in all our conduct it is the mean that is to be commended” essentially advocates for a balanced approach in all aspects of our lives. The ‘mean’ here refers to a moderate, middle-ground position between two extremes. This idea is rooted in the belief that extreme behaviors, emotions, or actions are often harmful or unproductive, while moderation brings about harmony and balance.

To illustrate, consider the virtue of courage. One extreme might be recklessness, where a person disregards all risks and consequences. The opposite extreme could be cowardice, where a person is overly cautious and avoids risk at all costs. The ‘mean’ or balanced position would be courage, where a person takes calculated risks, aware of the potential dangers but not paralyzed by them.

In today’s world, this concept is still very relevant. For instance, in the realm of personal finance, one extreme could be excessive spending and living beyond one’s means, while the other extreme could be extreme frugality, where one deprives themselves of any form of enjoyment or comfort. The ‘mean’ here would be sensible spending and saving, where one enjoys the present but also prepares for the future.

In terms of personal development, this philosophy encourages us to strike a balance in our pursuit of growth. For example, while it’s important to push ourselves and strive for improvement, we should also avoid the extremes of overworking to the point of burnout or being complacent and not making any effort at all. The ‘mean’ would be a consistent, sustainable effort towards growth and self-improvement.

In essence, this quote encourages us to strive for balance and moderation in all aspects of our lives, as it’s often the most sustainable and beneficial approach.