It may sound very strange -- I am Jewish and I am working on my sin, even though I am still not fully observant. At my age laziness to fulfill positive mitsvot is a much greater problem then lust.
Strange as it is for a long time I took inspiration for serving G-d and fulfilling Jewish laws from non -- Jewish sources. I have studied Christianity just out of curiosity. Many of their ideas are taken from Talmud and greatly simplified/distorted.
Maybe that is one reason I am so focused on the concept of sin. This may also be the reason why I allow myself ``minor" sins -- like saying only one or two Amidas a day and one or two Shema.