The 15th-century South Asian spiritual landscape bears the permanent imprint of Sikhism's founder, Guru Nanak. His ideas, which are enshrined in the revered Sikh text Guru Granth Sahib Ji, serve as the cornerstone of Sikh philosophy and continue to direct millions of his devotees around the globe. In addition to having a strong foundation in religious theory, Guru Nanak's legacy also includes significant humanitarian ideals that promote social justice, equality, and peace.

The core of Guru Nanak's teachings is the idea of "Ik Onkar," which emphasises God's unity. The words "There is but one God, His name is Truth, He is the Creator, He fears none, He is without hate, He never dies, He is beyond the cycle of births and death, He is self-illuminated, He is realised by the kindness of the True Guru" are spoken by Guru Nanak in the Guru Granth Sahib Ji (Guru Granth Sahib Ji, Japji Sahib). This declaration, which cuts over socioeconomic, religious, and cultural divides, establishes the groundwork for the unification of humanity.