I feel like I’ve abused God’s mercy.

Does anyone else get that feeling? I feel like I abuse God’s mercy when I sin. Even more so if that sin has anything to do with lust/masturbation. I’m currently struggling with this sin, but I feel like the more I try to escape the harder it is. I feel like the biggest hypocrite in the world each time afterwards. Please pray for me brothers and sisters. I fear for the worse if this does not stop.