Abu Ja’far Muhammad ibn ‘Ali ibn al-Husayn (peace be upon them all) said: "The most important matter, the best, the key, the entrance to all affairs and the pleasure of the Gracious Lord lie in obedience to the Imam after have recognized him." Then he said: Allah, Most High, says (in the Qur’an): "whoever obeys the messenger, has obeyed Allah. But, whoever turns away: ’We have not sent you (Muhammad) as a keeper over them.’ (Al-Nisa, 4: 80)"