I’m not one hundred percent positive this is Bacon (other sources cite Marie Beyon Ray), so don’t hold me to it.
I like it because it’s true and it’s false. In one way, like James says, life’s like a vapor. In another way, we’re already living a new and eternal life. So, we are both living in the fleeting moment and living in the eternal. We have a responsibility to get to work now, to make haste, and yet also have the joy of knowing that when time runs out, it’s not actually out.