The practice of reciting and writing sutras in order to remove obstacles and purify karma is common to many Buddhist traditions. The practice itself can be traced back to India, even though it is highly emphasized in the Tibetan Buddhist tradition.
Heart Sutra, 35 Buddhas, and Samantabadhra’s Prayer
The Heart Sutra, the 35 Confession Buddha’s practice and the Extroadinary Aspiration of Samantabadhra (King of Prayers) are commonly recited and are favorite prayers/sutras within the Tibetan Buddhist tradition. These prayers, are actually condensed, summarized versions of sutras that span thousands of lines. These include:
Working With Causes and Conditions at a Subtle Level
As Yangsi Rinpoche says, most people are used to working with causes and conditions at a gross level. In order to get to get a particular end result, someone could get a particular education or change jobs. Basically, these causes and conditions can be manipulated using one’s own intelligence and skills.
Working with causes and conditions at a more subtle level is something that requires the blessings of enlightened beings. Reciting and writing of sutras like the Heart Sutra, the King of Prayers, and the 35 Confession Buddhas are aimed at working with these subtle causes and conditions.