Christians who believe you still got to work to keep your salvation (lest you lose it) tend to become self-righteous and puffy towards others when they think they are doing a pretty good job.
Christians who believe they cannot shipwreck their faith (1 Tim 1:19) can fall victim to lustful ease and lackadaisical acceptance of life as it is without a motivation for change, unless they are trying to please God through good works (which they cannot do either) and so fall into the same trap, losing the "feeling" of being saved in an effort to act like a child of God, or in polarity doing nothing at all, wallowing in a lifestyle which bears no cross and is sadly nominal.
Sin is sin and it can and will trap you whereever you are. The soundest doctrine cannot save you...only Christ can.
Many Christians never enter "the rest" spoken of in Hebrews, bcos they are still trying to save themselves or work at keeping their salvation. For them heaven is not a guarantee.
By this definition they are not Christian. They are not saved. And if they do not enter the "rest" which is heaven, they will go to the other place.
Many Christians are in the asylum becos they believe (they were told & they believed) that they had committed the unpardonable sin and 'lost' their salvation.
The only way to lose salvation is to reject Christ. Yet, even those who were purchased by Christ can do this. (2 Peter 2:1)
As to the original post...
But those passages talk about following the statutes of God, and thus avoiding sin. How does laboring over nonmoral issues enhance the quality of life for a Christian?
Doctrine is a moral issue. False doctrine is a lie. Lying is amoral. False doctrine does not enhance the life of a Christian, but rather, steals from it, and can lead to a falling away from the faith. It is imperative that we do not elaborate or steal from the Word of God. The final chapter of Revelation promises judgement and plagues upon anyone who does. That is why Paul admonished Timothy to watch his doctrine closely. It is good that Christians do the same. What is sad is that often in the debate process, like good children of the Enlightenment, we rely on our intellects and reasoning and then proceed to explain away passages which may contradict our own views. Rather, we ought to accept that there are some parts of Scripture which are paradoxical, predestination being one of them. Let me illustrate:
The Bible is clear: God has chosen the elect. (take Romans 11:7 for example.) Yet the Bible is also clear that God does not want ANY to perish. It is not His will that any reject His gift of salvation. (2 Peter 3:9 is a good proof of that). Both Armeniaism (no election) and Calvinism (double predestination) have ways of purposefully ignoring one or the other of these passages which "seem" to contradict their point. But the fact is, both points are contradticted and to any atheist that would seem to be a contradiction in and of itself. But it is not so. The contradiction lies in our human intellect which, saved though we are, is still fallen and prey to our sin. Sometimes the answers God sends us are along the lines of, "I'm not telling you that yet." And I think that was the original point of this thread. But that hardly becomes an argument for casting aside all doctrinal differences. To do so is not only heresy, but a clear rejection of the Truth of the gospel. For Truth either is or is not True, and those things which are not true must be exposed for the lies they are. That is why the light has shown into the darkness to begin with, to display God for who He Truly is.
There are those who claim Christ is only one of many ways to God. These would seem to be none moral issues to those who want to say "Love love love and just be who you are and be happy together," but in TRUTH these are the HIGHEST of moral issues, for those who are poisoned by these lies of false doctrine will miss out on the inheritance Christ is offering them.
Now, before anyone gets angry, am I saying that Calvinists are not Christian? Surely not! But I am saying, as Paul did, that it is imperative that we watch our words and doctrine closely, and if we think we are standing firm, let us be careful that we do not fall. Let us not feel so secure in OUR salvation that we make grace an opportunity for sin, for it is a dreadful thing to fall into the hands of the living God. But let us be IMMEASURABLY certain of CHRIST'S SALVATION which not one of us can earn. His cross is the only assurance we will ever need. It is our sin which condemns us, but it is Christ who saves.
Peace to all who seek it: it comes in Christ.
