When a person recognizes, that he is genuinely a sinner?

At first, he compares himself to the Ten Commandments. And if he is sincere, it convicts him of many sins, whether envy and sinful lust or theft, lying and not keeping promises and word, disrespecting parents, cursing wickedness, and worshiping idols such as money or human praise. On the other hand, it is easy to be blameless regarding the law. If, therefore, a man, after he has believed and been converted, and after he has passed through the catechumen and has learned the Commandments, abandons evil deeds and grave sin, he might feel that he is already in a good place. He is already living righteously, his sins are erased, and he no longer has to look at himself as a sinner. But, the mistake trap!
Jesus says: “If ye keep my commandments, ye shall abide in my love, even as I keep my Father’s commandments, and abide in his love.”(Jn 15:10). What are they? Jesus repeats the N.T. command to love God with all your being, body, soul, passionately, to the uttermost. To love one another as he loves us devotedly, faithfully, irrevocably, unconditionally, and unconditionally, to the uttermost, even unto death, because that is how He loves us. To worship, genuinely love, actively, even strangers, even our enemies, and to be merciful to all, even to them, as our Father, God. Jesus speaks of those who “are counted worthy of that age and resurrection” (Lk 20:35), and these are the criteria of this “worthiness,” i.e., ability and readiness to live in the Kingdom. Outwardly, this readiness manifests itself, for example, in the fact that no effort, no sacrifice, no suffering, nor any persecution can turn us away from this, as he writes, for example, that “so we also glory in you throughout the churches of God: for your perseverance and faith in all persecutions and tribulations which you endure. And this is a sign of the righteous judgment of God, that you will be recognized as worthy of the kingdom of God, for which you are suffering” (2Sol 1:4-5)
What happens if we realize this? Perhaps the author described it best of the famous Pilgrim: “Toward the end of the week, I was preparing for confession, and it occurred to me that it should be as detailed as possible. So, I began to go through and look at all.  My sins from my youth to the present day. I did this very thoroughly, and to not forget anything, I wrote down everything I remembered as accurately as possible. I covered a large sheet of paper with it. I heard that in the Kitaev hermitage, about five miles from Kyiv, a priest who lives an ascetic life and is very wise and full of understanding. Anyone who has come to him to receive the sacrament of reconciliation found an atmosphere of tender compassion and left with a salutary lesson and peaceful spirit. I was greatly comforted when I heard about him and immediately to him. We talked for a while, and then I asked for his advice, handing him a paper to look at. He read it and said:
“My dear friend, much of your writing is utterly trifling. […]
You have given all sorts of details but overlooked the principal thing; you must still include the most serious sins. You have not confessed or written that you do not love God, hate your neighbor, do not believe in the word of God, and are full of pride and ambition. In these four sins is all evil and our spiritual destruction. They are the primary roots from which the shoots of all sins sprout, into which we fall.” At first, the author protested: “Forgive me, venerable father, but how is it possible not to love God, our Creator and Protector? What should we believe in, if not in the Word of God, which is all truth and holiness? To all ..to all my neighbors. Why should I hate them? I don’t
nothing to be proud of.” But the confessor instructs him thus: “Pity, my dear, that you have understood so little of what I have told you. Look! I will teach you more quickly if I give you these notes. I always use them when in my confession. Read them, and you will clearly and accurately prove exactly what I told you.”
The pilgrim takes the notes (they are as an appendix at the end of this reflection). After, with their help, he examines his interior, he discovers with horror the truth about himself: ‘At the reading of the confessional mirror which I received from the priest, I was horrified, and I thought to myself: ‘Heavens! What terrible sins are hidden in me, and yet  have not noticed it!” The desire for purification led me to beg this great spiritual father to teach me to know the causes of all this evil and how to cure it.”
At that moment, our Christianity finally “clicks” where it should be: I am a sinner, and though I may be blameless in the eyes of the law, I am still a proud and selfish sinner in my heart. I am utterly helpless against this; in no way can I not overcome or remove this sin in myself. I am a sinner, a wretch, and a wretch. My only hope is that the merciful Lord will look upon me. The efforts, so slight in magnitude, will add a significant quantity of his grace and abundantly supply what is lacking in my insufficient efforts! And so, according to the words of Scripture, “with fear and trembling work out your salvation” (Phil 2:12).