Kigezo cha kuhukumu kama Muislamu ana shakhsiyya ya Kiislamu ni usahihi wa 'aqīdah (imani) yake ya Kiislamu na kujenga mawazo na mielekeo yake juu yake. Mradi msingi ni sahihi na kujenga mawazo na mielekeo kunategemea tu 'aqīdah ya Kiislamu, makosa adimu ya bahati mbaya, yaani mapungufu katika mwenendo, hayaharibu shakhsiyya ya Muislamu. Lakini 'aqīdah ikiharibika, hilo humtoa mtu katika Uislamu, hata kama matendo yake yamejengwa juu ya aḥkām (hukumu) za Uislamu, kwa sababu katika hali hiyo hayatakuwa yamejengwa juu ya i'tiqād (imani thabiti) bali juu ya kitu kisicho imani thabiti: iwe ni tabia au desturi, kuendana na watu, manufaa yanayodhaniwa ya matendo hayo, au kitu kingine zaidi ya hivyo. Ikiwa mchakato wa kujenga unaharibika kwa sababu ya kutumia manufaa au akili kama msingi wa kujenga tabia, mtu huyo atakuwa Muislamu kwa sababu ya usahihi wa 'aqīdah yake, lakini hatakuwa shakhsiyya ya Kiislamu, hata kama yuko miongoni mwa wabebaji wa Da'wah ya Kiislamu, hata kama mwenendo wake wote unaendana na aḥkām za Uislamu. Hii ni kwa sababu kinachomfanya mtu kuwa shakhsiyya ya Kiislamu ni kujenga mawazo na mielekeo juu ya 'aqīdah ya Kiislamu kwa sababu ya kuiamini. Kwa hiyo, ni wajibu kwa wale wanaopenda Uislamu na wanaotaka uwe mkuu na ushindi, lakini hawajengi fikra zao juu ya mawazo na hukumu zake bali juu ya akili zao wenyewe, maslahi yao au matamanio yao, kujihadhari na tendo kama hilo, kwa kuwa linawaweka mbali na kuwa shakhsiyya za Kiislamu; hata kama 'aqīdah yao ni kamili na hata kama wana ujuzi mkubwa wa mawazo na aḥkām za Uislamu. Jambo muhimu linalostahili kuzingatiwa ni kwamba kuukubali ‘aqīdah ya Kiislamu (imani) kunamaanisha kuamini kila kitu alichokuja nacho Mtume ﷺ kwa ujumla wake, na kile kinachothibitishwa kwa dalili za hakika [qat’i], na kwamba kukubali yote haya kuwe kwa kuridhika na kunyenyekea. Inapaswa kufahamika kwamba maarifa pekee hayatoshi, na kukataa hata jambo dogo kabisa lililothibitishwa kwa hakika kuwa sehemu ya Uislamu kunamtoa mtu katika dini na kumtenganisha na ‘aqīdah (imani). Uislamu ni kitu kisichogawanyika kwa upande wa imani na kukubali; kuacha hata sehemu moja yake kunapelekea kufuru [kufr]. Kwa hiyo, kuamini kutenganisha dini na maisha au na Dola ni kufuru isiyo na shaka. Allah سُبْحَانَهُۥ وَتَعَالَىٰ anasema,
The criterion for judging whether a Muslim holds an Islamic Shaksiyyah is the soundness of his Islamic ‘aqīdah (creed) and the building of his thoughts and inclinations upon it. As long as the basis is sound and the building of thought and inclinations are exclusively on the Islamic ‘aqīdah (creed), rare inadvertent errors, that is, gaps in conduct do not compromise a Muslim’s Islamic shakhsiyya (personality). But if the ‘aqīdah (creed) becomes flawed, this removes the person from Islam, even if his deeds are built on the ahkām (rules) of Islam, because in that case they would not be built on firm conviction [i’tiqād] but on other than firm conviction: either on habit or custom, on conformity to people, on the (perceived) benefit of such deeds or on other than that. If the building process becomes flawed due to the use of benefit or the intellect as the basis on which to build behaviour, the person would be a Muslim due to the soundness of his ‘aqīdah (creed), but he would not be an Islamic shakhsiyya (personality), even if he was among the carriers of the Islamic Da’wah, even if all his conduct is in conformity to the ahkām (rules) of Islam. This is because what makes one an Islamic personality is the building of thought and inclinations on the Islamic ‘aqīdah due to belief in it. To this end, it is imperative for those who love Islam and want it to be dominant and victorious but do not build their thinking on its thoughts and rules but rather on their own minds, interests or desires, to be wary of such a deed, because it distances them from being Islamic personalities; even if their ‘aqīdah (creed) is intact and even if they were highly knowledgeable of the thoughts and ahkām (rules) of Islam. Of that which is imperative to draw attention to is the fact that embracing the Islamic ‘aqīdah (creed) means belief in all that the Messenger ﷺ came with, as a whole, and in that which is established by definitive [qat’i] evidence, and that the acceptance of all this be accepted with contentment and submission. It should be known that mere knowledge does not suffice and that rejecting even the most minor of matters proven definitively as part of Islam removes the person, and detaches him, from the ‘aqīdah (creed). Islam is an indivisible whole as fair as belief and acceptance is concerned; relinquishment of (even) a part of it is entails disbelief [kufr]. Hence the belief in the separation of the deen from life or from the State is indisputable kuf (disbelief). Allah الله سُبْحَانَهُۥ وَتَعَالَىٰ says,