The truth is that the Holy Quran and the holy Ahlul Bayt can...
The truth is that the Holy Quran and the holy Ahlul Bayt can never be separated from one another. In my opinion, Progeny is higher than Quran because Quran is the argument of Quran whereas Progeny is talking Quran (Quran Natiq). That Ali (a.s.) has said that he is Quran Natiq is a profound evidence for a faithful man to appreciate Progeny as very graceful. Only one who is an opponent or enemy of Ali (a.s.) can deny this.
In short, the tradition of Two Heavy Things (Hadith Thaqalayn) shows that Imamate is a divine affair. The reason why non-Imamiyah consider it a branch of belief (secondary) seems to be that by the phrase of “We have the Book of Allah…” (Hasbona…) the subject of Imamate, which is based on the tradition of Two Heavy Things (Thaqalayn) has been removed altogether. So no wonder if…