You're alive only once, as far as we know, and what could be worse than getting to the end of your life and realizing you hadn't lived it?

This quote emphasizes the importance of living life to its fullest. It means that we only get one chance to make our life meaningful, and it would be a shame to waste that opportunity. Life is too short to not make the most of it. If we get to the end of our life and realize we haven’t lived it, that would mean all our potential and experiences, and the memories we could have had all wasted away.