You have experienced that many times and it's frustrating, right?
One particular night many years ago, after juggling with the hectic schedule for so long, I finally got to wash our car thoroughly. I was excited to have that awesome feeling of driving a clean and shiny treasure the next day. And the next morning just as I was departing from the cozy shelter, rain came and stained our car..
As I was thinking about how disappointing this was on my way to work, I heard that still small voice, whispering to my heart that this is exactly how I always make Him feel. When I encountered Him and turned from my old ways, He washed me clean and gave me a whole new self. But right on the next morning I would easily allow the devil to suggest thoughts to my mind, and eventually give in to my flesh desire, as if the encounter with Him never happened the night before.
That was a deep conviction to me, and it has become a regular reminder to me on God's greatness and grace to each one of us.
God so loves us amazingly, that He chose to die for us when we were still sinners.