The significance of Leviticus 14 for us today was not easy for me to grasp—still, I was helped particularly by Dr. Constable’s notes, and also the NET Bible notes (https://net.bible.org/#!bible/Leviticus+14:1 ) to understand these verses better. Leviticus 14.57b is a summary: “These are the regulations for infectious skin diseases and mildew.”
Quoted by Constable: “If Lev. 13 is bleak, speaking of separation from the holy presence, Lev. 14 is full of hope, for in it the sufferer is restored to the covenant community. The Israelite learned even more about the nature of the holy God through these provisions for restoration to fellowship in the community.”
Another quote from Constable near the end of the chapter: “. . . with the coming of Christ, God himself sought out the ‘lepers’ and healed them. Jesus came to seek and save that which was lost. His outreach to the lepers was on a par with his ministry to other sick people and social outcasts, such as tax-collectors and prostitutes. . . . Jesus’ ministry and that of his disciples (Matt. 10:8) was one which brought reconciliation between God and man. Therefore the old laws isolating men because of their unsightly appearance had become inappropriate and out of date.”
Proverbs 10:11 compares the mouth of the righteous and the wicked; 10:12 links hatred with dissension, and love with harmony.