The Pillars of faith are:
Belief in Allah: "It is the firm belief that Allah is the Lord and Sovereign of everything, the only Creator, the One worthy of worship and submission, the One Who possesses the attributes of perfection, and the One Who is Exalted above any deficiency, along with being committed to this and acting upon it." [70] "Siyāj al-‘Aqīdah al-Imān Billāh" by ‘Abdul-‘Azīz ar-Rājihi (p.9).
Belief in the Angels: It is the belief in their existence and in the fact that they are creatures from light who obey Allah Almighty and never disobey Him.
Belief in the Divine Books: It includes every book that was sent down by Allah Almighty on every messenger, like the Gospel that was sent down on ‘Isa (Jesus), the Torah that was sent down on Mūsa (Moses), the Psalms that was sent down on Dāwūd (David), the Scriptures of Ibrahīm (Abraham) and Moses, [71] and the Qur’an that was sent down on Muhammad (may Allah's peace and blessings be upon them all). The original copies of these books contain the message of Tawhīd (monotheism), which means belief in and worship of the Creator alone; however, they were distorted and were abrogated after the revelation of the Qur’an and the Sharia of Islam.
Belief in the prophets and messengers.
Belief in the Last Day: It is the belief in the Day of Judgment when Allah resurrects people for reckoning and recompense.
Belief in Divine Decree and Predestination: It is the belief in the plan of Allah for the creatures according to His prior knowledge and in compliance with His wisdom.
The level of Ihsān (perfection) comes after Imān (faith) and it is the highest level in the religion. The meaning of Ihsān is manifest in the words of the Prophet (may Allah's peace and blessings be upon him) as he said: "Ihsān means to worship Allah as if you see Him, for, although you do not see Him, He surely sees you." [72] The Hadīth of Jibrīl (Gabriel). [Narrated by Al-Bukhāri (4777) and Muslim with a similar narration (9)]
Ihsān means perfecting all acts and deeds and exerting the utmost efforts for the sake of Allah Almighty without expecting a material return or human praise or gratitude. It also means performing deeds in a manner that conforms to the Sunnah of the Prophet (may Allah's peace and blessings be upon him) and that is sincerely offered for the sake of Allah Almighty with the intention of getting close to Him. Those who adopt Ihsān in the societies are the successful role models who benefit others by encouraging them to follow in their footsteps in carrying out religious and worldly good deeds, seeking the reward from Allah. This is the category through whom Allah fulfills the development and prosperity of the human life and the construction and progress of countries.