I basically plagiarized scripture with my previous comment.
I think there are two extreme, and wrong, positions concerning this issue.
1. People who believe in a shallow faith, one that is based solely upon saying a prayer, believing in God, and then living a life that doesn't reflect a regenerate heart...these folks need to be told to fear God and obey Him, because they are not truly following Christ. Their lives manifest NO righteousness at all, especially not God's. They are goats.
2. The idea that we can earn our way to Heaven apart from regeneration and God's love, like the Pharisees and Scribes. Again, these people are not following Christ, but an extreme form of legalism that excludes Jesus and mainfests only self-righteousness, not God's righteousness or Love.
Both extremes do not deny their flesh, do not pick up their cross, and ultimately do not follow Christ.
The Narrow way, as I understand it, is that our belief MUST be unto righteousness. Sanctification begins as soon as one is regenerate, with true belief/faith, and so I am not convinced that it should be separated from justification anymore, even in distinction. I admit I really need to study this more in Scripture with the help of the Holy Spirit to be convinced completely. I have always advocated that obedience is needed, but I always felt it was the result, or a fruit, of justification...I don't think that the Scripture really teaches this on the whole...I think being justified and sanctified may be inseparable in the Word. In any case, I think we need to realize, and teach, that Fearing God and obeying Him is not the same as legalism, and that God desires us to be obedient, to do good works, to gladly endure trial and testing so that we can mature fully in love and manifest God's righteousness in our lives...not just individually, but also corporately. It is the one who overcomes the world through the Spirit that is allowed to enter in, and while I believe that God is the Author and Finisher, the one who makes me holy, I also think He expects me to dedicate myself, or consecrate myself, to Him by walking worthy (in the Spirit) of my calling...His calling upon my life.