Live For The Now, Not The Forever

I am destined to live forever - if forever is 5,000 years. But what if I am wrong? Perhaps I should live for the now and if I'm right I have hundreds of years to make up for the time "wasted" being "irresponsible" and if I'm wrong then I die with nothing other than having lived as I'd have preferred.

Emily Who?

Birds and bees and butterflies and trees,
Who'd know of Emily without these?