On the other hand, one can get a similar
life-to-the-fullest mindset without the desperation and stress of
time running out, by changing it thus:
There are two phases to life: learning, and dying.
One is not truly dying until one has given up on the universe, and while one cares about the universe, one learns. So go out, explore, experience, do everything you would ever want to, and do it well! But don't get yourself killed in some wild stunt because you'll miss out on the rest...