Crossing the Line of Sin

The Mason Dixon line in a past century was a border that divided the Northern States from Southern States. Do we Christians have a line that can be crossed? A line that goes from Not Sinning to Sinning? When does "the sin" really start? Matthew 5:27-30
Larry

Larry Sharp currently is serving in the United Church of God at Riverside, California, as an Elder initially ordained in 1984, and is a member of the General Conference of Elders for the United Church of God. He serves with his wife Vicki of over 50 years of marriage. He is now a retired Microbiologist having worked in the medical field for over 40 years with service in the US Air Force, private hospitals, and the Los Angeles County Medical System.