When I became a parent, I finally understood unconditional love. I understood how mad or frustrated I could be with my recalcitrant child while loving her so much my heart would almost burst every time I gazed at her. Although He's a much better parent than I will ever be (and so I hesitate to compare myself to Him), I finally understood how God could still love me even when I screwed up. I'm sure there have been countless times when God's buried His head in His hands and moaned "Really, Nancy? When will you learn?!" while patiently guiding me down the path.
So, when times are dark and I feel distant from God, I remind myself that He still loves me and the sun will shine again soon.