Belief in part of the Book and disbelief in part of it, and the state of the sinner

Question:
There are those who believe in Islam and its laws in their entirety, but in some matters they are corrupt. Does the description of believing in part of the Book and disbelieving in part of it apply to them?

Answer:
Faith is not the same as action. Faith is in the heart. If a person believes in part of the Book and does not believe in the rest, or if he associates partners with Allah in it, then he believes in part of the Book and disbelieves in part of it. As for action, it may be disbelief, it may be open sinfulness, or it may be a sin.
If he does not consider lawful what Allah has forbidden, and does not consider forbidden what Allah has made lawful, but only commits some transgressions out of desire and lust, while he believes that what Allah has forbidden is forbidden and what He has made lawful is lawful, then he is not a disbeliever. He is a sinner. He is a sinner, and his sin may be major or minor, depending on the transgression. Yes.

The presenter:
May Allah reward you,