1. Tawheed — The Oneness of God
توحید
Dear friends! The first and foundational principle of Islam is Tawheed — the absolute Oneness of God. This is the cardinal article of Islamic faith upon which everything else rests. Before the Prophet (peace and blessings of Allah be upon him) was sent, the world was submerged in polytheism (shirk) and idol-worship. People worshipped fire, water, trees, animals, the stars, and handmade idols. The concept of One God, transcendent above all creation and free from all partners and associates, had been all but lost.
Islam declares with absolute clarity that God — Allah — is One. He has no partner, no associate, no equal, and no offspring in the divine sense. He is the Creator of everything and the Sustainer of everything. He is the Living, the Self-Subsisting (Al-Hayy, Al-Qayyum). He does not sleep, does not tire, and is not limited by time or space. He is near to every soul and yet transcends all things.
Tawheed is not merely a theological proposition — it is a liberating force. When a person truly accepts the Oneness of God, he is freed from servitude to every other power. He need not fear any tyrant, for he knows that only Allah is truly sovereign. He need not beg at the doors of the powerful, for Allah alone is the Dispenser of all sustenance and all affairs. This is why Tawheed is described as the source of human dignity and the foundation of freedom.
The Reality of Tawheed
Consider how people, before Islam, were enslaved to countless false objects of worship. They prostrated before the powerful, before wealth, before nature. Islam came and broke all these chains. It declared: there is no God but Allah. This one statement — La ilaha illallah — was the revolution that transformed the world. Every person who sincerely accepted it was elevated in dignity. The slave became the equal of his master. The poor became the equal of the rich — before God, the only distinction is of piety and righteousness.
The Qur'an affirms Tawheed in countless places. Among the most celebrated is Surah al-Ikhlas (112), which in just four brief verses encapsulates the entire doctrine of divine unity:
قُلْ هُوَ اللَّهُ أَحَدٌ اللَّهُ الصَّمَدُ لَمْ يَلِدْ وَلَمْ يُولَدْ وَلَمْ يَكُن لَّهُ كُفُوًا أَحَدٌ
"Say: He is Allah, the One. Allah, the Eternal Refuge. He neither begets nor is born. Nor is there to Him any equivalent." (Al-Ikhlas, 112:1-4)
There is not a single attribute of divinity that is not encompassed in this brief Surah. "Al-Samad" (the Eternal Refuge) means that all of creation depends upon Allah while He depends upon nothing. He is the ultimate source of all things, and all things return to Him.
The Qur'an also warns against the greatest sin in Islam, which is shirk (associating partners with Allah):
إِنَّ اللَّهَ لَا يَغْفِرُ أَن يُشْرَكَ بِهِ وَيَغْفِرُ مَا دُونَ ذَٰلِكَ لِمَن يَشَاءُ
"Indeed, Allah does not forgive association with Him, but He forgives what is less than that for whom He wills." (An-Nisa, 4:48) — Shirk (polytheism) is the one unpardonable sin if one dies upon it, because it is the negation of the very foundation of Islamic faith.
Dear friends! Tawheed is also the foundation of moral reform. When a person truly believes that Allah sees everything and is aware of every thought and action, he cannot persist in wrongdoing. The consciousness of God's all-seeing presence is the most powerful deterrent to sin and the most powerful motivator toward righteousness. This is the inner dimension of Tawheed.