Psalm 30

Psalm 30 has one of my favorite passages in it.  Verse five says: 

  ⁵For His anger is but for a moment,
         His favor is for a lifetime;
         Weeping may last for the night,
         But a shout of joy comes in the morning. 

God's anger doesn't last long and by morning he forgives.  You may feel sorrowful for now, but soon you will be happy again.  We don't always remember that, especially when we are going through the dark times of our lives.  But no matter what, you will be happy again.