If it is true that...

The crucifixion saved humanity from sins

Then it must be true that...

Humanity is naturally sinful and requires Jesus for righteousness

If it is true that...

No individual is righteous on their own

Then it must be true that...

Humanity is naturally sinful and requires Jesus for righteousness

If it is true that...

Humanity was dead in sins, but was saved by God's grace

Then it must be true that...

Humanity is naturally sinful and requires Jesus for righteousness