Mahamudra-The Ocean of True Meaning contains the essence of the Buddhist path of liberation that the Buddha Shakyamuni taught in the 5th century before Common Era.
This text was written by the 9th Karmapa Wangchug Dorje who lived in the 16th century.
Up to the present day this text is used by teachers and students of the Karma Kagyü transmission lineage for guidance and inspiration in meditation.