Love, Livestock, and Leprosy

The book of Leviticus is basically a list of laws and legal provisions cover nearly all of life -- love, livestock, and…leprosy. There are multiple (long) chapters that address leprosy, leprous people, contaminated things, and infected properties.
For the time period this was highly applicable. Leprosy was one of the most devastating and mysterious diseases around. It was no respecter of persons. Everyone knew it took your life even while you were still living, slowly eroding your dexterity, disfiguring your face, and then, eventually, it killed you. Leprosy was a dreaded disease.
If all of Scripture is written for our learning (and it is, Romans 15:4), what are we supposed to glean from these reams of Levitical commands? We don’t have leprosy anymore… Do we?
They were vigilant in their surveillance for leprosy, what are we supposed to be vigilant against (1 Peter 5:8)? They cut out portions of clothing and tore their houses apart to eradicate this disease, they were ruthless. What are we supposed to be ruthless against (Matthew 5:29)? They were careful to separate themselves from those who were actively ill. What are we supposed to separate ourselves from (Leviticus 20:26)?
Like leprosy, sin is a devastating condition, often mysteriously invisible. It affects the rich and the poor the same. It insatiably consumes your motivation, time, and love -- until it takes your life, even while you are still alive. Leprosy may have been eradicated – sin hasn’t. Sin is the dreaded disease.