Isaiah 1: Jerusalem must repent

 Isaiah 1

Although the Lord has punished severely his people, they seem worse than animals because they don't recognize his Owner (v3). They pretend to worship the Lord by being very religious (v11-12), but in fact, they abhor the Lord who demands purity from his people (v16-17). The Lord is merciful and invites his people to repent from their sins: 

18-20 “Come. Sit down. Let’s argue this out.”

    This is God’s Message:

“If your sins are blood-red,

    they’ll be snow-white.

If they’re red like crimson,

    they’ll be like wool.

If you’ll willingly obey,

    you’ll feast like kings.

But if you’re willful and stubborn,

    you’ll die like dogs.”

That’s right. God says so.

The Lord loves Jerusalem although she is very dirt behaving like a whore (v21). The Lord decides to clean Jerusalem (v25): the Lord will save who repent but will destroy the rebels (v27-28).