This quote is a profound commentary on the nature of life and the concept of capital punishment. The phrase "when there is no life to take" suggests that Thoreau is challenging the conventional understanding of life as mere biological existence. He implies that there’s a difference between merely being biologically alive and truly living.

The "needless ado" refers to the societal and political debates and the moral quandaries that capital punishment stirs up. Thoreau seems to question the value of such discussions, given his belief that the individuals subject to capital punishment may not be truly ‘living’ in the fullest sense of the word.

Applying this idea to today’s world, it could be argued that many people are merely existing rather than truly living. This could be due to a variety of factors such as societal pressures, economic constraints, or personal fears and insecurities. In this sense, Thoreau’s quote could be seen as a call to action to strive for a life that is more than just biological existence, a life filled with purpose, passion, and personal fulfillment.

In terms of personal development, the quote can be seen as a reminder to not get caught up in the mundane and superficial aspects of life. Instead, one should strive to lead a life of substance and meaning. It encourages individuals to question their current state of life and to reflect on whether they are merely existing or truly living. This introspection can lead to a more fulfilling and meaningful life.

In essence, Thoreau’s quote is a critique of capital punishment but also serves as a metaphor for a broader commentary on the nature of life and the importance of living fully and meaningfully.