What is the interpretation of the Exalted's saying: "Have you not seen those who purify themselves? Rather, Allah purifies whom He wills, and they will not be wronged by a hair's breadth"?

The explanation of the verse "Have you not seen those who purify themselves" clarifies that purifying oneself means absolving oneself of sins, and that Allah purifies whom He wills by guiding them to righteous deeds. The text indicates that a human being purifying himself is astonishing, citing the false claims of the Jews and Christians. It emphasizes that Allah is the One who purifies souls by guiding them to faith and righteous deeds, and that they will not be wronged in the slightest.