What Is Aqidah and Why Is It Important for Every Muslim?

Definition of Aqidah

Aqidah originates from the Arabic word عقيدة (aqīdah), which signifies a strong and firm belief rooted in the heart. In Islam, aqidah refers to the fundamental beliefs that every Muslim must hold concerning the oneness of Allah, the prophethood of the Prophet Muhammad ﷺ, and other core teachings that serve as the foundation of the religion.

According to Sheikh Muhammad bin Salih al-Uthaymeen in his book Sharh Ushul Iman, aqidah is "faith that must be firmly held in the heart without allowing the slightest doubt within it."

Why Is Aqidah Important?

Aqidah is the foundation for all acts of worship. Without correct aqidah, no act of worship will be accepted by Allah. This is based on Allah's statement in the Qur'an:

وَمَا أُمِرُوا إِلَّا لِيَعْبُدُوا اللَّهَ مُخْلِصِينَ لَهُ الدِّينَ حُنَفَاءَ

Wa mā umirū illā liya'budullāha mukhliṣīna lahud-dīna ḥunafā'

"And they were not commanded except to worship Allah, being sincere to Him in religion, inclining to truth." (QS. Al-Bayyinah: 5)

In this verse, Allah emphasizes that acts of worship are only accepted if they are grounded in sincere and correct aqidah. Worship performed without correct belief becomes futile.

Evidences Regarding the Importance of Aqidah

1. The Obligation to Believe in Allah
   Allah says in the Qur'an:

   فَاعْلَمْ أَنَّهُ لَا إِلَٰهَ إِلَّا اللَّهُ

   Fa'lam annahu lā ilāha illallāh

   "So know, [O Muhammad], that there is no deity except Allah." (QS. Muhammad: 19)

   In this verse, Allah commands humanity to know and believe that only Allah has the right to be worshipped. This is the essence of Islamic aqidah, which affirms the concept of tawhid, the oneness of Allah.

2. Believing in the Messenger of Allah ﷺ
   Allah says in the Qur'an:

   وَمَا آتَاكُمُ الرَّسُولُ فَخُذُوهُ وَمَا نَهَاكُمْ عَنْهُ فَانْتَهُوا

   Wa mā ātākumur rasūlu fakhudhūhu wa mā nahākum 'anhu fantahū

   "And whatever the Messenger has given you, take it; and what he has forbidden you, refrain from it." (QS. Al-Hasyr: 7)

   This verse affirms the obligation to believe in the Prophet Muhammad ﷺ and to follow all his guidance and teachings. Faith in the Messenger is an integral part of correct aqidah.

3. Hadith on the Foundation of Islam
   The Prophet ﷺ said:

   بُنِيَ الإِسْلاَمُ عَلَى خَمْسٍ: شَهَادَةِ أَنْ لَا إِلَهَ إِلَّا اللَّهُ وَأَنَّ مُحَمَّدًا رَسُولُ اللَّهِ وَإِقَامِ الصَّلاَةِ وَإِيتَاءِ الزَّكَاةِ وَالْحَجِّ وَصَوْمِ رَمَضَانَ

   Buniya al-Islāmu 'alā khams: Syahādati an lā ilāha illallāh wa anna Muhammadan rasūlullāh wa iqām aṣ-ṣalāh wa i'tā' az-zakāh wal-ḥajji wa ṣawmi Ramaḍān.

   "Islam is built upon five pillars: testifying that there is no god but Allah and that Muhammad is His Messenger, establishing salah, paying zakat, performing Hajj, and fasting in Ramadan." (Agreed upon by al-Bukhari and Muslim)

   This hadith demonstrates that aqidah (the testimony of faith) is the primary foundation underlying all other pillars of Islam. Without correct aqidah, the remaining pillars hold no meaning.

The Scholars' Explanations Regarding Aqidah

Ibn Taymiyyah (may Allah have mercy on him) explained in Kitab al-Istiqaamah that aqidah is the principal basis of the religion. He stated, "Every deed performed by a Muslim depends upon his aqidah. If his aqidah is corrupted, then all of his deeds are likewise corrupted."

Sheikh Al-Albani (may Allah have mercy on him) also emphasized the importance of preserving pure and upright aqidah. In his book Al-Tawhid wa Akhtari, he stated, "Correct aqidah is the foundation that will save a Muslim in this world and the Hereafter. Without correct aqidah, all acts of worship will be rejected by Allah."

Conclusion

Aqidah is the paramount foundation in Islam that determines the validity of all acts of worship for a Muslim. The importance of aqidah is clearly evident from the numerous verses of the Qur'an and hadiths that emphasize the obligation to believe in Allah, His Messenger, and the fundamental principles of the religion. Every Muslim must understand aqidah correctly so that all their acts of worship are accepted by Allah and they attain salvation in this world and the Hereafter.

May Allah grant us a correct understanding of aqidah and keep us far away from deviation. Ameen.