[metmom]

But finally, one who knowingly and willingly resist any dogma of the Church to the end cannot be saved, no.

Which is found no where in Scripture and the Catholic church saying it is so doesn't make it so.

Salvation is found only in the person of Jesus Christ, not in any organization.

[annalex]

the Catholic church saying it is so doesn't make it so.

It does. "Whatsoever you shall bind upon earth, shall be bound also in heaven; and whatsoever you shall loose upon earth, shall be loosed also in heaven" (Matthew 18:18)