Think of it more this way.
It’s not that we don’t know that we sin, but we just need to be more aware of Christ than our sin. Go back to the incident from Numbers 21 that Jesus quoted in John 3 when he said, that he would be lifted up as Moses lifted up the serpent on the pole. The serpent on the pole represented Jesus on the cross for our sin. He took on our sin that we might be righteous (II Cor 5:21).
When the people looked at the serpent on the pole, they were healed of the snake venom. The snake venom is like the stain of sin we are all born into this world with. I heard a guy named Bayless say something pretty funny, but accurate on this point.
“Those who focused on their snake bite died!”
We have to look unto Jesus the author and finisher or our faith (Hebrews 12:2). Finally, I John 1 talks about walking in the light – being aware that there is the need for a saviour because we have sinful behaviors, but we must also be ever aware of the provision of a sacrifice. I John 1: 7 reads
“But if we walk in the light as He is in the light, we have fellowship with one another, and the blood of Jesus Christ His Son cleanses us from all sin.”
So, while we are aware of shortcomings, there is a fountain that is ever cleansing us! 1 John 2:1 also reads,
“My little children, these things I write to you, so that you may not sin. And if anyone sins, we have an Advocate with the Father, Jesus Christ the righteous”.
It’s not that we don’t know what sin is (the law is always there defining sin), but if we become more aware of the law than grace, sin will manifest even more (I Cor 15:56, Romans 7:5). Remember the Mercy Seat was on TOP of the law. Quoting Hosea 6:6, Jesus said in Matt 9:13 – “But go and learn what [this] means:
‘I desire mercy and not sacrifice.’ For I did not come to call the righteous, but sinners, to repentance.”
More and more sacrifices, more law keeping, more self penitence, is not what God is after. He wants us to come under grace, come under the covering of the Lord Jesus Christ. It doesn’t mean that we live a flippant life, but the means to living that life is not by being more and more aware of one’s self. We become like what we worship. If we worship Him, behold Him, see His righteousness that covers us, we will become like Him. We will be transformed from glory to glory.
We are all on a journey to know Him better and to drive sin from our lives. The means is where we grapple.
Have a great day!