[3] All books of Resalah start with an explicit disclaimer stating that no proof shall be given for any of the points in the Usul al-dín.
[4] The Marja' argue that it is permissible to imitate in matters of practical Islam, for example, how one is supposed to do Salat, without being familiar with evidence and arguments for the conclusions.
[5] However, they argue that the matters in the roots of religion are much too important to be merely imitated, and it is the responsibility of each individual to make themselves personally familiar with the arguments and evidence for each article of faith.
[9] Tawhid (Arabic: توحيد, romanized: Tawḥīd, also spelled Tauhid or Tawheed) is the Islamic concept of monotheism.
In Islam, Tawḥīd means to assert the unity of God, it is not just unity of God Almighty but also Uniqueness, as defined in Quran surah 112, He is not born of anyone nor gave birth to any one, nor is any one like Him.
[10][11] According to Seyyed Hossein Nasr, Ali, the first Shia Imam, is credited with having established Islamic theology and his quotations contain the first rational proofs among Muslims of the Unity of God.
[12] Ali expresses that "God is One" means that he is away from likeness and numeration and he is not divisible even in imagination.
"[24] Tawhid of the attributes means to deny the existence of any sort of multiplicity and combination in the Essence itself.
He adds, to account some created things as partners of God in creation is the Shirk of Creatorship or to believe that some creatures are the agent of some actions.
[17] The fourth level of Tawhid pertains to the oneness of lordship and of the governance of the world and man.
According to Islam, every choice of an orientation, ideal or a spiritual qibla is a kind of worship.
According to the Hadith of the Twelve Successors, Muhammad said that the Islamic leadership is in Quraysh (i.e. his tribe) and that 12 "imams" (also called "princes" or "caliphs") shall succeed him.
Belief in Qiyamah is part of Aqidah and is a fundamental tenet of faith in Islam.
The trials and tribulations of Qiyamah are detailed in both the Qur'an and the Hadith, as well as in the commentaries of the Islamic expositors and scholarly authorities.
Every human, Muslim and non-Muslim alike, is held accountable for his or her deeds and are judged by God accordingly (Qur'an 74:38[45]).