Imam Sadiq (peace be upon him): Allah has never sent a prophet who did not come with commands and prohibitions. Allah accepts from His servants their acts of worship and the obligations, within their limits, only on condition of recognising the one who brought them and who calls to Allah. The first obligation is recognising him; then following his instructions. Whoever recognises him, obeys; and whoever obeys, comes to know the forbidden in its outward and inward aspects, and cannot regard the inward as forbidden while treating the outward as permitted. The outward has been forbidden by reason of the inward, and the inward likewise by the outward; both are forbidden together. It cannot be that the root and its branches, with the inward being forbidden, are themselves forbidden while the outward is permitted; the outward being permitted never renders the inward forbidden. Likewise, it is not possible for someone to know the inward prayer but not know the outward prayer, nor zakat, nor fasting, nor Hajj, nor Umrah, nor al-Masjid al-Haram, nor all the divine commands and religious rites; nor is it possible for him to abandon knowledge of the inward, for the inward is the very outward. It is not correct for any one of them to be abandoned. If the inward is forbidden and impure, the outward is likewise. Whoever imagines that only ma'rifah (recognition and knowledge) is required, and that after recognition one has no need of action, has lied and is a mushrik (polytheist). Such a person has neither recognition nor obedience. It has been said: "إعرف و اعمل ما شئت من الخیر [Recognise, then do whatever good you wish]," because a good deed without recognition is not accepted. Once you have attained recognition, then do for yourself whatever obedience you wish, little or much — it will be accepted from you. Pay attention! Whoever is an arif (one who recognises) is obedient. When he has attained recognition, he prays, he fasts, he performs Umrah, he honours all the commands, and does not abandon any of them. He performs all good deeds and the noble traits of character, and keeps away from evils. The foundation of all these is the Prophet, for he is the one who brought them, guided to them, and commanded them; and nothing of them is accepted from anyone except through him. And whoever recognises him keeps away from the major sins, and holds al-fawahish (indecencies) — ما ظَهَرَ مِنْها وَ ما بَطَنَ [those of them that are apparent as well as those that are concealed] — to be forbidden, and holds all the forbidden things, outward and inward, to be forbidden; because through recognising the Prophet and obeying him he has entered into the commands of the religion and come to know the forbidden things. Whoever regards something as lawful or unlawful without recognition of the Prophet has never, for Allah's sake, held a lawful thing to be lawful nor a forbidden thing to be forbidden. Whoever performs the prayer, zakat, Hajj, Umrah and all these commands without recognition of the one whose obedience Allah has made obligatory upon him — not an atom of it is accepted from him; he has not prayed, nor given zakat, nor performed Hajj, nor Umrah, nor made ghusl for janabah, nor purified himself, nor observed a forbidden thing for Allah's sake, nor a lawful thing. He is not a person of prayer even though he has performed ruku and sujud, and not a person who has paid zakat even though he has given one dirham out of every forty dirhams. Whoever recognises the Prophet and obeys him has obeyed Allah.