A whole life with all its ups and downs, glories and tragedies,victories and losses, drawbacks and perfections, could end in a second. An unexpected second, and even in fractions of that second. You won't know, you won't feel it and you won't have the chance to save yourself.
So does it really matter how sad or how happy you feel right now? Does that job you're seeking or this girl, or man, you're longing for matter? Is life really worth all this worries and thinking? Does it?!?!