It is now forty years since this book was written, twenty since it was translated into English, and twelve since the translation was first published. The issues that had caused the author so much concern at the time have become, without exception, all the more pressing today. The need to convey the Islamic concept of Tawhid to the world at large in clear unequivocal terms has been and shall remain the Muslim's first duty. Now that there is renewed worldwide attention toward Islam, it has become even more urgent to convey its core concept, without which there is no religion : the Oneness of God.

ABOUT THE AUTHOR: Habib Ahmad Mashhur al-Haddad
Habib Ahmad Mashhur al-Haddad was widely acknowledged as among the leading scholars and spiritual masters of the twentieth century. He was born in a town in Hadramawt, in southern Arabia. At an early age he committed the Quran (the Muslim scripture) to memory and spent most of his time in the relentless pursuit of the various branches of religious knowledge. He dedicated his life to teaching and spreading the word of Islam. This present book is his most celebrated and is widely read. He died in Jeddah, Saudi Arabia, December 6, 1995, and was buried in cemetery near Makkah.

ABOUT THE TRANSLATOR: Mostafa al-Badawi
Mostafa al-Badawi is one of the world's premier translators of Islamic spiritual texts. He is a Consultant Psychiatrist and member of the Royal College of Psychiatrists. He studied under many shaykhs, foremost among whom is the late Habib Ahmad Mashhur al-Haddad. His other translations include: Book of Assistance, The Lives of Man, Two Treatises, The Prophetic Invocations, and Degrees of the Soul. He is also the author of Man and the Universe: An Islamic Perspective, recently published. He resides in Madinah.

Excerpts from the book:
La ilaha illa Allah: A phrase sublime in its meaning, brief in its construction, vast in its effect, noble in its rank, brilliant in its light, and unique in its merit. It comprises four words upon which the Faith is founded and the qibla set. This is the phrase that was given in every Book sent down by God to every one of His noble Messengers, and through which one is rescued from the infernal fires and wins eternal happiness in the Gardens. God the Exalted has said: Know that there is no god but God! (Quran, 47:19); I am God, there is no god but Me, so worship Me! (Quran, 20:14); God, there is no god but He, the Living, the Sustainer (Quran, 2:255); God, there is no god but He, to Him belong the Most Beautiful Names (Quran, 20:8); and We sent no Messenger before you without revealing to him: 'There is no God but Me, so worship Me' (Quran, 21:25).
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God alone, and none other, is the true Deity, the Necessary Existent, who is Creator, Producer, Fashioner, Provider, Giver of life and death, and Wise Disposer; who has perfected everything He has created, and excelled in everything which He has made; who directs all things with ultimate precision, and has determined everything He has decreed. He alone is the true God, Pre-existent and Eternal, worthy of inward and external worship, exalted above all blemish, who possesses the most exalted attributes and the most beautiful names. His are might and majesty; none shares in His essence, attributes or actions. There is no other God than He.
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Sound knowledge and conclusive proofs have established that everything in the universe, whether it be high or low, articulate or mute, is interconnected. The universe is constructed of harmoniously interrelated and interacting forces. If a single atom should deviate a hairs breadth from its designated course, for which it was created, the order of the world would be upset, its precise interconnectedness disrupted, and the heavens would collapse upon the earth. The worlds have been and shall remain joined and bound in mutual attraction, performing the functions they were created for, in the most perfect, ordered, and precise way until the appointed time.

Who then is the creator of all this? Who has originated these tremendous forces? Who moves the planets in the heavens, maintains their orbits and their regularity, and has governed them since the beginning of the world? Who holds the heavens back from collapsing upon the earth? Who moves ships in the seas, clouds in the air, and arranges the affairs of all beings upon the earth? Who sustains all that is in the heavens and earth, whether planets, shining stars, nations of different races, languages, and traits, and all other excellently fashioned and precisely disposed things, which have performed their functions down the ages with such exactitude? Is it not God, Lord of the Worlds, the Omniscient, the Able, the Disposer, the Wise, to whom belongs all Sovereignty, who has neither partner nor helper?