The holy book of Sikhism is the Guru Granth Sahib. Within the Sikh tradition, this scripture is not regarded merely as a text, but as the living embodiment of the Guru’s wisdom and presence. It gathers together the teachings and hymns of the Sikh Gurus, forming a spiritual thread that unites the community around devotion to one God. In this way, the Guru Granth Sahib stands at the heart of Sikh religious life, guiding thought, worship, and conduct.

The Guru Granth Sahib also includes writings from various Hindu and Muslim saints, reflecting a vision that recognizes divine truth as shining through many voices. By preserving these diverse compositions side by side, the scripture bears witness to a spirituality that transcends narrow boundaries while remaining firmly rooted in the oneness of the Divine, often referred to as Waheguru. This inclusive character underscores a central Sikh insight: that authentic devotion naturally flowers into respect for all seekers of truth.

After the tenth human Guru, Guru Gobind Singh, the Guru Granth Sahib was declared the final spiritual authority, and from that point onward it has been revered as the eternal Guru. Its authority is not only doctrinal but also deeply practical, shaping how Sikhs understand their responsibilities in the world. The scripture repeatedly emphasizes that true devotion to one God must be expressed through righteous living, meditation on the Divine Name, and selfless service, or seva. In this light, service to humanity is not a secondary duty but a direct manifestation of love for the One, turning spiritual insight into compassionate action in everyday life.