Exegesis of the saying of Allah the Exalted: “Those are upon guidance from their Lord, and those are the successful ones”

“Those” refers to the righteous ones who believe in what has preceded. That is, they are upon a path from Allah, Mighty and Majestic. He said: “from their Lord” is for the purpose of conveying that Allah’s favor upon them with this is a special favor; it is a special lordship for them, not the general lordship.
“Those” is repeated to highlight their virtue and the highness of their rank. As for His saying: the scholars say that “they” here is a separating pronoun (dhamir al-fasl), which is a pronoun that has no grammatical position in the sentence because it is only used for emphasis. They said: its benefits are three. The first benefit is emphasis, the second is restriction, which is specification, and the third is conveying that what follows it is a statement (khabar) and not a description. For this reason, it is called a separating pronoun. This means that success is restricted to them, and success is attaining what is sought and being saved from what is feared.