Therefore...
Therefore, Muslims have to revert to the infallible imams of the Prophet’s progeny as they are the only ones who can correctly interpret and explain the revelation of Allah and purify the Prophet’s traditions from all blemishes and distortion.
If the final goal of Muslims today is the call to go back to the righteous first companions to take the two sources of legislation from them only as they were the best of people, as most of Muslims believe - then we have to ask these people what their argument is. We can ask them for a convincing evidence and inevitable proof from which no Muslim can turn here or there. This would make any Muslim submit satisfactorily while his heart is certain.
Just trusting in someone or even his righteousness and good conduct do not make it certain that he has sound perception or infallibility. Imam Ali, the Gate to the Prophet’s City of knowledge, referred to this point when he said: In the hands of people there is truth and falsehood, truthfulness and untruthfulness, abrogating and abrogated (rulings), general and special (rulings), clear and ambiguous, memorizing and supposition.
There was fabrication against the Messenger of Allah (S) in his time itself until he made a speech saying, ‘Let him, he who intentionally fabricates against me - take his seat in the Fire…’ In fact, those who convey to you such speech are four kinds of men, and there is no fifth one.
First is a hypocrite man who shows faith, pretends Islam, does not refrain from sins or feel shy and fabricates intentionally against the Messenger of Allah (S), may Allah have blessing and peace on him and his progeny. If people knew that he is a hypocrite and liar, they would not accept from him or believe what he says.
Instead they said, ‘he is a companion of the Messenger of Allah (S), may Allah have blessing and peace on him and his progeny, that he (the hypocrite) has seen him - the Prophet (S), heard from him, and taken from him’. And so people accepted him even though Allah has informed you about the hypocrites with what He has informed and described them to you with what He has described.
They followed him after the Prophet, peace be on him and approached the leaders of deviation and the inviters to the Fire with falsehood and fabrication. They entrusted them with posts and made them rulers over the necks of people, and consumed with them this worldly life. Surely, (most of) the people are with rulers and the worldly life except those whom Allah has preserved.