In relation to your question, I figured when I was 9 that it depended on what I wanted to do with the time I was given. I had newly been diagnosed with a disease that gave me between 2 months to 2 years to live... Many existential questions were placed back on the table, as I used to ponder these questions quite a bit already before that tender age.
Since then, I have lived by the mantra "Rush as slowly as you can". Meanwhile, the what is one to do with that time was becoming the question. I have chosen to live in the truth of love for it is sustaining life in all its glory. From there I quickly realized that the my happiness was ultimately connected to the happiness of others. Living sustainably brings forth the relation of what one de ides to do and the quality of that venture within the scope of the fulness of your being. There aren't no mistakes, only learning till there aren't anymore. But then, the road from enlightenment to self-realization is only equivalent to the one we take on our road to awe, the very first moment of enlightenment, a very long one in deed.
Many live a much fuller life in a much shorter time span than others as the quality of their life and what they realize out of it are far beyond the life of one who lives a long life unconsciously and without awareness of the quality of the choice of the actions they involve themselves in. The latter, lives on a rudderless sailboat wasting their life like a zombie while the other is thriving, moving forth within the realm of their immediate knowledge, toward the elimination of anything that stands between them and love, growth, happiness, and so forth.
So, is the quality of your life allowing you to feel blessed? Are you thriving, really and deeply happy? Is the time you spend on this plane allowing you to shed the clutter that keeps you away from the freedom of your consciousness? Is your social and physical environnement moving towards sustainability, toward a spot where life itself found itself enhanced by your passage in this lifetime? May you find peace and the path of your destiny as within it is found the synchronicity of our being here and now. Namaste :)