There are mysteries in our faith, genuine paradoxes. There’s a mystery of iniquity, that anyone would ever deliberately choose to sin against God, as most everyone does as a manner of life, and also a mystery of faith (1Ti 3:16), how salvation can be by faith while God judges us by our works.
On the one hand, we’re justified before God by faith, by believing on Christ (Jn 3:18) and not by works. (Ro 3:28) On the other hand, on Judgement Day, we know God will render to everyone according to their deeds: those who’ve patiently continued in good works as a manner of life will be saved, and those who haven’t will be damned. (Ro 2:6-9) How can both be true?
The answer lies in seeing salvation as the work of God (Jn 6:29), where He regenerates the human heart (Col 2:13) and begins working in us to will and to do according to His pleasure. (Php 2:13) As God so works in our souls, we actually do persistently try to obey Him as a manner of life; we cannot live otherwise (1Jn 3:9), and no one else can live like this. (1Jn 3:10)
So, those who say they know God but aren’t, as a rule of life, trying their best to do what He says, are simply lying. (1Jn 2:4) While there are countless ways to deceive ourselves (Ja 1:22) into thinking, “carry on my wayward son, there’ll be peace when you are done,” it’s hoping in Satan himself. There’s no safe place outside a life pattern of obedience to God.
Whether we live in a way that’s morally acceptable to society or not isn’t the point: neglecting God’s laws and living life our own way makes us God’s enemies. (Ro 8:7) Nearly everyone lives like this. (1Jn 5:19)
As saints, we know that we still sin (1Jn 1:8), and that our works will never be good enough for God (Ga 3:10); we find our only rest in the finished work of Christ. Yet even though we know we can’t lose eternal salvation, we won’t sin willfully, on purpose, thoughtfully, deliberately, as a manner of life. (1Jn 3:8) We’re new creatures (2Co 5:17), always trying our best to obey God, even though that may not be very good.