Agreed. But is there a distinction between those who truly apply what they know and what strive to achieve and yet fall short vs those who in the face of the facts and commands purposefully go against the same?
I don't make it that complicated. I try to keep the truth of God as simple as possible, as the Gospel is simple. I know that I believe in Jesus Christ, trusting Him as my Savior. The fact that I believe is the main thing, as it says in 1 John, when the people were concerned about their eternal security in salvation, God gave it to them through John. I use nothing else as my "security".
Yet I do see His fruit developed in my life daily. I've had the privilege and blessings to lead thousands to the Lord, plant churches and pastor others. Yet even without all of that, the fact that I believe is the first and last step of assuring that I'm right where I'm supposed to be :)