Who should be imitated?

Answer: One should imitate a Mujtahid who is a complete Mujtahid, meaning a Mujtahid who is a man, an adult, a sane Shiite, who is not greedy for the world, and who is more knowledgeable than other Mujtahids, meaning he is lawfully born, alive, and just in understanding the rulings of the Twelve Imams;

and also, according to obligatory precaution, he should be more knowledgeable and accomplished than a Mujtahid from all the Mujtahids of his time.