The connection of mind amd matter. We will join it with other frameworks as a complete system of intelligence and human wisdom. Understanding true nature and its inherit empty nature is but a step to letting go of desire and freedom from suffering.
It joins spirituality and helps make it a lifestyle. Activating the PNS rest and digest is at the heart of all spirituality I see, from chanting to singing to silent prayer to whirling dervishes to yoga to the 112 ways of Shiva to Janisism to Gnosticism to teachings of love to Chakras to Mongolian throat singing and even shoalin.
Everything we do can be processed on the ANS fight or flight or PNS rest and digest. History has shown many people attaining great wisdom by pure reflection inward working a full balanced human system.