How many types of ṣiddīqiyya are there? The answer: There are over seventy types, corresponding to the number of branches of iman (faith) that the ṣiddīq (utterly truthful one) must affirm. Ṣiddīqiyya is solely ittibāʿ (following). The prophets who are sharia (the sacred law) bearers differ from the walī (friend[s] of God) prophets who lived during periods of fatra (intervals without a messenger) and did not bear a sharia; the latter are ṣiddīq. For in this station, the prophets receive the sharia only from the rūḥ (the spirit) that is revealed to their hearts. This descent is not a descent of knowledge, but a descent of report. 900 ṣidq.
They discover this only through the light of iman. Thus, they are ṣiddīq due to the spirits that descend upon them.
Similarly, whoever receives something from the existence of the Real (al-Ḥaqq) by this divine inspiration from Allah, receives it not as a manifestation (tajallī), but only through iman and its light. Manifestation does not grant what iman grants. Manifestation gives by the light of the intellect, not by virtue of being a muʾmin (believer). As mentioned, the types of ṣiddīqiyya are not limited to these. For one cannot know what Allah grants to those to whom He conveys reports. The comprehensible types of ṣiddīqiyya are those things that appear in divine reports. Believing in these reports, and assigning these matters exclusively to Allah, is a nearness attained thereby. This is related to the name ṣādiq (truthful). This is necessary; the paths to Allah may be conceived in this way. Surely, there is only the ṣādiq there. And there, the only one who gives the report is Allah. The things reported must not be denied.
We have said: When the ṣiddīq receives this from the ṣādiq, he is one who never denies those reports. However, the ṣiddīq, knowing that the only one who gives the report is Allah, even if he receives knowledge from Allah, affirmation (ṣiddīqiyya) requires accepting everything that the reporter reports.
What is ṣiddīqiyya? It is a green light between two lights. With this light, it becomes possible to witness the things brought from the unseen by the light of generosity of the one who gives the report. Allah's name in the Qur'an, as He has named Himself, is al-Muʾmin (the Giver of Faith). This iman is a light, that is, a Book. Allah says: "He is Allah, other than whom there is no deity, the Sovereign, the Pure, the Perfection, the Bestower of Faith, the Overseer..." (al-Hashr 59:23). Here, al-Muʾmin has two meanings: one who grants security, and the other, one who affirms as truthful those who are ṣādiq among His servants, as opposed to those whose truthfulness is not established. (Futūḥāt, I, 90)
Ṣiddīqiyya is established upon six fundamentals: Islam, iman, ṣalāḥ (righteousness), ihsan (spiritual excellence), shahāda (testimony), and maʿrifa (gnosis, experiential knowledge of God). Maʿrifa has three levels: ʿilm al-yaqīn (knowledge of certainty), ʿayn al-yaqīn (eye of certainty), and ḥaqq al-yaqīn (truth of certainty). Each level has seven conditions of its own kind: the first is fanāʾ (annihilation in God), the second is baqāʾ (subsistence in God), the third is maʿrifa of the Essence (al-Dhāt) in terms of the manifestation of His Names, the fourth is maʿrifa of the Essence in terms of the manifestation of His Attributes, the fifth is maʿrifa of the Essence as the Essence, the sixth is maʿrifa of the Names and Attributes with the Essence, and the seventh is being characterized by the Names and Attributes. (Insān, II, 85)