Important points of this narrative According to text of...
3: their quality is that glory and greatness of Islam depend on them and people’s support or opposition have no effect on their guidance. 4: resembling them to the chieftains of children of Israel shows that selecting them to this position is in hand of god; not people, as almighty god has selected chieftains of children of Israel and like prophets of children of Israel, they’re infallible that only god knows about people’s infallibility.
5: they follow divine guidelines supervising religion; and their job is spreading justice and fighting oppression. 6: these caliphs of messenger of Allah [PBUH] come to guide people constantly at any time which means caliph of messenger of Allah will be on the earth until day of resurrection come up.
(4) Hadith “Thaqalayn” restates that Quran and “” who are caliphs of messenger of Allah won’t separate from each other and their existence on the earth is constant until day of resurrection. So, according to this narrative, caliphs of messenger of Allah [PBUH] come one after another one constantly and no time is empty of the existence of one them.