and that His commands, prohibitions, and communications are temporally originated, because commanding, prohibiting, or informing the nonexistent is impossible.

And that the prophets are protected from (1) error, forgetfulness, and every sin, minor or major, from the beginning of their lives to the end. Otherwise, no confidence (2) would remain in what they convey, the purpose of sending them would be nullified, and people would necessarily be repelled by them. (3)

And that the imams are protected from these things just like the prophets, as stated earlier (4).

They derived their rulings (5) on subsidiary matters from (6) the infallible imams, who transmitted them from their forefather, the Messenger of Allah—may Allah bless him and grant him peace—(7), who received them from (8) Allah Most High through revelation (9) brought to him by Gabriel. They transmit these rulings on the authority of trustworthy narrators, generation after generation, until the chain of transmission reaches one of the infallible figures. They gave no consideration to rulings based on personal opinion or independent juristic reasoning, and they forbade reliance on analogical reasoning and juristic preference, and so on.”