Machine summary:
Their intention must always be purely devoted and they must possess absolute infallibility; just as it is in the Prophets, the Successors, and the Angels, in their beliefs whether in minor or major matters; whether intentionally or unintentionally; whether before the mission or after the mission; and whether in propagation, in rulings, in their actions, or otherwise; whether in spirituality, or that he is the Universal Intellect, and the Universal Intellect is fully active and is the very essence of infallibility in judgment and in actions; Therefore, what has been attributed to the Prophets regarding "leaving the better option" (tark al-awla) or "engaging in superfluous permissible things" is not acceptable to us in response to such an objection; for there are no permissible things (mubahat) in relation to them, nor is there a place for superfluous permissible things, and likewise, no attention to anything other than the Truth will emanate from that Excellency; because it has been explained that their intention is purely devoted and their celestial aspect is elevated in such a way that they are better than the angels throughout their entire lives.
And it is self-evident that that Excellency was the confidant of God's secrets, and according to the correct view: sixty-two years, eleven months, and eleven days was the lifespan of the Holy Prophet, and he spent fifty-three years in Mecca, forty years before the mission and thirteen years after the mission, and ten years in Medina after the Hijra, and the duration of his prophethood was twenty-three years.
Some say that: among those twelve, [these] four pure lights are the most superior: first, the Father of the Imams, Ali—peace be upon him—; second, Imam Hasan—peace be upon him—; third, Imam Husayn—peace be upon him—; and fourth, Imam Ja'far al-Sadiq—peace be upon him—; as it is well known that they say: the Ja'fari school; because during his time, Taqiyya (dissimulation) was lifted, thus the divine rulings were spread by him—peace be upon him—and the sphere of his authority was also manifest.