At the heart of Sant Mat’s Inner Light and Sound path lies a living library of poetry, hymns and commentaries passed down from saint to seeker. The Guru Granth Sahib (often called the Adi Granth) anchors many gatherings: its hymns by Sikh Gurus, Kabir and other bhakti poets map the soul’s journey inward. Kabir’s own Bijak (“Seedling”), plus the celebrated Kabir Sagar and Anurag Sagar, unpack that famous couplet—“As deep as the ocean”—by guiding readers toward the ocean of light within.

Shiv Dayal Singh’s Sar Bachan offers a set of spiritual blueprints, peppered with practical pointers on daily life and meditation posture. From the 19th century onward his followers tucked these teachings into their hearts, later crafting additional manuals of discourse. Among those, the Das Bodh (by Samarth Ramdas) often shows up in satsangs; its crisp verses on duty and devotion complement Sant Mat’s emphasis on living consciously at every turn.

As the Radha Soami branch took root in Punjab, works by Jaimal Singh (“The Science of the Soul”) and Sawan Singh’s Discourses became staples—these collections read like friendly letters, reminding modern-day meditators that tuning in to the Sound Current isn’t some far-fetched notion but a down-to-earth technique anyone can practice before sunrise. Kirpal Singh, Jagat Singh and other 20th-century masters added volumes of talks, blending Eastern mysticism with hints of Western psychology, as though stitching two worlds together.

In recent years, satsangs at California’s Marin Retreat and online gatherings during global lockdowns have widened access to these writings. Today’s devotees might scroll through PDF translations of Kabir’s Granthavali or revisit Guru Nanak’s Jap Sahib on a smartphone app—proof that centuries-old verses still resonate like fresh spring water, inviting anyone with eyes to read and ears to listen.