You know what's promising about sunset? It's the idea that we did our best today and tomorrow is another day to start again. 
There are times that days are not as good as we ought to be, but that's life. The struggles that we had is the flavors in our lives, why? Because if it's not because of those struggles, we can never appreciate "the good days". Those struggles is the reason why we are stronger and braver than yesterday. 
Just like sunset, we will rest for a while but we will stand up stronger than yesterday.