We are only asked to love, to offer hope to the many hopeless. We don't get to choose all the endings, but we are asked to play the rescuers. We won't solve all mysteries and our hearts will certainly break in such a vulnerable life, but it is the best way. We were made to be lovers bold in broken places, pouring ourselves out again and again until we're called home.
On one thing most physicists agree. If the amount of dark energy in our universe were only a little bit different than what it actually is, then life could never have emerged. A little larger, and the universe would have accelerated so rapidly that matter in the young universe could never have pulled itself together to form stars and hence complex atoms made in stars. And, going into negative values of dark energy, a little smaller and the universe would have decelerated so rapidly that it would have recollapsed before there was time to form even the simplest atoms… .
We are an accident. From the cosmic lottery hat containing zillions of universes, we happened to draw a universe that allowed life. But then again, if we had not drawn such a ticket, we would not be here to ponder the odds.