Chasidut do Wyjścia 19:7

There are some people - both great and small - who are not aware of their own shortcomings. And even when they see in Mussar books that such and such a trait is bad, it nevertheless does not cross their mind that they have such a trait and that they need to fix it. Neither do they feel pain or concern about it. This is not a good sign for [this person]. For this is the way of sick people - to not feel their sickness getting worse or even to know that they are sick. (See the Rambam's Eight Chapters 3.) However there are also adults and youths with the following trait: His heart inside begins to feel that he has a certain shortcoming and he [then] begins to worry and be in pain. But his mind quickly rationalizes it by saying, "Is it not the case that the shortcoming I have is not as bad as what the book is criticizing? And the small amount that I have is almost impossible to remove, since 'there is no righteous man in the world who never sins.'" This too is a partner to the evil impulse; and [such a person's] end will be the pollution of his spirit and the darkness of Gehinnom. The root of both of these is that they do not seek greatness from themselves. They imagine that only tzaddikim and greats must work to better themselves, but it is sufficient for all other Jews to just be anything that they are. This is like a father who has a fool for a son, so that his father does not require much from him and suffices with the little good that is found in him. And he even overlooks his sins, saying, "Is he not a fool?" But such a man (who rationalizes his own shortcomings) is greatly mistaken. And we have already spoken above about how everyone must strive, help and reveal the tzaddikim, the greats and the giants of the Jewish people; and how the Divine Presence laments the negligent person. But even if he just wants to be a simple Jew, why is he forgetting what a simple Jew is, and the condition that God made with each Jew - from the woodchopper to the water-drawer - when He first came to make them into the Jewish people and to give them the Torah? He said (Exodus 19:5-6), "Now then, if you will obey Me faithfully and keep My covenant, you shall be My treasured possession among all the peoples, etc. And you shall be to Me a kingdom of priests and a holy nation." This is the Jew - [someone from] a kingdom of priests and a holy nation. It was a condition that the Holy One, blessed be He, made: "Now then, if etc." Only if so, will you be Jews. But if not, God forbid...