Ik – There is ONE (Ik) reality, the origin and the source of everything. The creation did not come out of nothing. When there was nothing, there was ONE, Ik.
Onkaar – When Ik becomes the creative principle it becomes Onkaar. Onkaar manifests as visible and invisible phenomenon. The creative principle is not separated from the created, it is present throughout the creation in an unbroken form, 'kaar'.
Satnaam – The sustaining principle of Ik is Satnaam, the True Name, True Name.
Kartaa Purakh – Ik Onkaar is Creator and Doer (Kartaa) of everything, all the seen and unseen phenomenon. It is not just a law or a system, it is a Purakh, a Person.
Nirbhau – That Ik Onkaar is devoid of any fear, because there is nothing but itself.
Nirvair – That Ik Onkaar is devoid of any enmity because there is nothing but itself.
Akaal Moorat – That Ik Onkaar is beyond Time (Akaal) and yet it is existing. It's a Form (Moorat) which does not exist in Time.
Ajooni – That Ik Onkaar does not condense and come into any birth. All the phenomenon of birth and death of forms are within it.
Saibhang – That Ik Onkaar exists on its own, by its own. It is not caused by anything before it or beyond it.
Gurprasaad – That Ik Onkaar expresses itself through a channel known as Guru and it is only its own Grace and Mercy (Prasaad) that this happens.
The Mool Mantar is the most important composition in Sikhism, reflected in the fact that it is the opening text of the Guru Granth Sahib. Sikhs believe that the Guru Granth Sahib is the word of Waheguru and is infallible.
The word "Mool" means "main", "root" or "chief", and "Mantar" means "magic chant" or "sacred verse". Together, they mean "Main chant" or "root verse".
The Mool Mantar is the first composition uttered by Guru Nanak Dev upon enlightenment at the age of about 30. It encapsulates the entire theology of Sikhism in a brief form.
It has religious, social, political, logical, martial, and eternal implications for human existence. It is a truly humanitarian and global concept of the Supreme power for all to understand and appreciate.
The rest of Japji Sahib is an elaboration of this main mantar, and the entire Guru Granth Sahib, spanning 1430 pages, is a detailed amplification of the Mool Mantar.