This quote suggests that in order to truly live, to genuinely exist in the world, one must live their life as if they’ll never have the opportunity to exist again. It’s a call to embrace the present, to make the most of the current moment, because once it’s gone, it will never return. It’s a plea to live fully, authentically, and passionately, without the safety net of believing you’ll have another chance in another lifetime.

This idea could be applied in today’s world or in personal development in several ways. For instance, in an era where many people are increasingly consumed by technology and social media, it’s a reminder to step back and engage fully with the world around us, to truly exist in it rather than simply observing it through a screen.

In terms of personal development, it encourages individuals to seize opportunities, take risks, and pursue their passions, rather than waiting for a ‘better time’ or a ‘second chance’. This could mean finally starting that business you’ve been dreaming of, traveling to a place you’ve always wanted to visit, or simply telling someone how you really feel about them. Because if we live our lives waiting for another chance, we may never truly live at all.

This quote also speaks to the importance of living authentically and staying true to oneself. To ‘exist just once’ is to live a life that is uniquely yours, not a replica of someone else’s life or a life lived according to someone else’s expectations. It’s about being true to who you are and what you believe in, regardless of societal pressures or norms.

Finally, this quote could serve as a reminder of the impermanence of life, and the importance of making the most of the time we have. It encourages us to live fully and passionately, to squeeze every drop of joy, love, and experience out of our existence, because we only get one shot at it.