If you've been a Christian for any length and time and still insist that you must always approach God
as a lost and wretched sinner, it might be time to change your identity.
Or, to state it another way, God already has changed your identity, so perhaps it's time you learned to embrace that wonderful change!
There's no doubt there was a time you were that lost and wretched sinner (we all were!), but if you have become a disciple of Jesus Christ, then God has changed your identity from what you once were to what you are now, and are in the process of becoming.
"Don't you realize that those who do wrong will not inherit the Kingdom of God? Don't fool yourselves. Those who indulge in sexual sin, or who worship idols, or commit adultery, or are male prostitutes, or practice homosexuality, or are thieves, or greedy people, or drunkards, or are abusive, or cheat people --- none of these will inherit the Kingdom of God. Some of you were once like that. but you were cleansed; you were made holy; you were made right with God by calling on the name of the Lord Jesus Christ and by the Spirit of our God," 1 Corinthians 6:9-11.
There's nothing pious or noble in insisting on continuing to see yourself as a pathetic sinner when God has transformed you into a saint; not a perfect saint, but one who is free from sin, and is now an ambassador for Jesus Christ.
You will try to live up to the identity you embrace for yourself. Why not live up to the one God has given you rather than the one God has set you free from?