One question that is often raised when discussing the supremacy of Gurmat and the greatness of Guru Nanak Dev Ji is this: if Gurmat is truly supreme, then why does the Bani of so-called non-Sikhs appear in Sri Guru Granth Sahib Ji?

The answer is simple and straightforward. There is no writing of non-Sikhs in Sri Guru Granth Sahib Ji. Gurmat and Gurbani alone are the path to Sach Khand. Therefore, Sri Guru Granth Sahib Ji cannot endorse the views or words of non-Sikhs. Every single Shabad in Sri Guru Granth Sahib Ji is either the Bani of Guru Sahib or the Bani of a Gursikh.

Sri Guru Granth Sahib Ji does not contain the writings of Hindu or Muslim saints. It contains only the Bani of the Guru Sahiban and of those Sikhs who were blessed to utter Dhur Ki Bani, the divine revelation. Gurbani clearly teaches that Sikhi is the sole path to true liberation, and views or writings outside Sikhi cannot align with this truth.

It is true that the Bhagats whose Bani is included in Sri Guru Granth Sahib Ji were born into Hindu or Muslim backgrounds. However, upon meeting Guru Nanak Dev Ji, they realized the ultimate truth and became Sikhs of Guru Nanak Dev Ji. They received Naam and lived according to Gurmat principles. This is precisely why their Bani was accepted.

There are fifteen Bhagats whose Bani is included in Sri Guru Granth Sahib Ji. Gurbani repeatedly emphasizes that liberation is not possible without the Satguru. Guru Nanak Dev Ji is identified as the Satguru, and all the Bhagats whose Bani is enshrined in Sri Guru Granth Sahib Ji acknowledged the supremacy of Guru Nanak Dev Ji and received Naam from him. Naam, bestowed by Satguru Nanak Dev Ji, was central to their spiritual journey. Through Naam, they attained liberation and became free of sins, as stated in Gurbani: ਕਲਜੁਗਿ ਨਾਮੁ ਪ੍ਰਧਾਨੁ ਪਦਾਰਥੁ ਭਗਤ ਜਨਾ ਉਧਰੇ

Gurbani itself clarifies this transformation. For example, it states:

ਨਾਮਾ ਛੀਬਾ ਕਬੀਰੁ ਜੋੁਲਾਹਾ ਪੂਰੇ ਗੁਰ ਤੇ ਗਤਿ ਪਾਈ ॥
Namdev the printer and Kabir the weaver attained liberation through the Perfect Guru.

Even when we read the Bani of the Bhagat Sahiban, it is clear that they rejected Hindu and Muslim religious identities. Their writings explicitly disown these labels and fully align with Gurmat principles, focusing on the worship of the One True Akal Purakh. For example, Bhagat Namdev Ji speaks against idol worship, while Bhagat Kabir Ji criticizes Muslim practices such as Ramadan, Hajj, and circumcision etc.

In addition to the Bhagats, the Bani of eleven Bhatts is also included in Sri Guru Granth Sahib Ji. These Bhatts were originally Hindu Brahmins by background. In their deep spiritual search, they travelled across the Indian subcontinent for about a year, seeking true fulfillment. Their journey eventually brought them to the Darbar of Guru Arjan Dev Ji. Upon meeting Guru Sahib, they abandoned Hindu Dharam, embraced Sikhi, and became Sikhs of Guru Sahib. By Guru Sahib’s grace, they were blessed with the ability to utter Dhur Ki Bani.

Alongside them, there are the writings of three more Gursikhs. Two of them were Hazoori Raagis of Guru Sahib, and one was the grandson of Sri Guru Amar Das Ji. 

Thus, the presence of Bhagat and Bhatt Bani in Sri Guru Granth Sahib Ji does not weaken the supremacy of Gurmat. Rather, it reinforces the truth that only through the Satguru Nanak Dev Ji liberation be attained.