Explain how Shirk negates the principle of Tawḥīd.

How Shirk negates the principle of Tawhid

Tawhid is the absolute Oneness of Allah in His Lordship, His worship and His names and attributes. Shirk is the association of partners with Allah. Shirk is the direct opposite of Tawhid and completely destroys it in the following ways:

1. It divides worship that belongs to Allah alone: Tawhid requires that all worship, prayer, sacrifice and supplication be directed to Allah only. Shirk diverts part of this worship to idols, saints, spirits or created things, which contradicts the very meaning of "none has the right to be worshipped except Allah."
2. It assigns partners in Lordship: Tawhid affirms that Allah alone creates, sustains, gives life and death, and controls the universe. Shirk claims that other beings share in these powers, thereby denying Allah's sole Lordship (Tawhid ar-Rububiyyah).
3. It corrupts belief in Allah's names and attributes: Shirk likens the perfect attributes of Allah to those of creatures or attributes divine qualities such as knowledge of the unseen to others, violating Tawhid al-Asma' was-Sifat.
4. It contradicts the testimony of faith: The Shahadah begins with negation ("there is no god") before affirmation ("except Allah"). Shirk restores the false gods that the Shahadah negates.
5. It is the greatest and unforgivable sin: Allah says He forgives all sins except that a partner be set up with Him (Q.4:48). Shirk nullifies all good deeds (Q.39:65) and, if unrepented, condemns a person to eternal loss, showing that it entirely cancels the benefit of Tawhid.

Therefore, wherever Shirk is present, Tawhid is absent, for the two cannot exist together in the heart.