One thing I hate about this debate is the unwillingness to accept certain bible verses. When someone posts warnings in the bible about turning to sin, you get the same "salvation is not by works" and "those who believe in Him shall not perish" verses in response. And those are important, too. But I dont know why people cant put them all together as one teaching.
Paul wrote in Galatians 2:21 that we do not nullify grace, that if righteousness were from the law, Christ died for nothing. But we are still warned to be watchful, and told that sin leads to death. I think the lesson is clear. Accept Him as your Lord and Savior, and obey His commandments. If we love Him, we will keep His commandments. But God is merciful, when we fall, we can come back to Him and repent again, and ask for help. If we continue to be faithful to Him, both in Him being our Lord and Savior, we are saved by His grace, as a gift and act of compassion and mercy. But that means we must submit to Him as our Lord, there is no room for ignoring His commandments.
Theres too much debating over which verses we should listen to, I think its all one teaching, and we should accept all of it.