Continuation of the chapter: The believer's fear that his deeds may be nullified while he is unaware, and what he should guard against regarding persisting in hypocrisy and disobedience without repentance, by the saying of Allah the Exalted

The Shaykh : ... Yes, he says: "and what he should guard against" this is conjoined to "fear," meaning the chapter on what he should guard against regarding persisting in hypocrisy and disobedience without repentance, by the saying of Allah the Exalted: And persisting in sins is very serious, even if they are minor.
The scholars have mentioned that persisting in a minor sin makes it a major one. And Allah, Blessed and Exalted is He, said regarding the one who, when the verses of Allah are recited to him, says, "Fables of the former ones." Allah the Exalted refuted him, saying: They are not the fables of the former ones. So why does he say "fables of the former ones"? A seal was placed upon them, they were sealed, until he came to see the Noble Qur'an as the fables of the former ones.