“Quiver” or “vibration;” divine activity; the dynamic aspect of Shiva; the creative primordial vibration. It is the “throb” of the utter bliss of the Ultimate Reality. It is not movement as ordinarily understood, but the transcendental cause of all motion. Spanda is an atemporal vibration. It is a prominent technical concept in Kashmir (or Northern) Shaivism. Spanda is also the name of one of the four main schools of Kashmir Shaivism. The term was introduced by Vasugupta (circa 800 A.D.) and is usually described as the “vibration of consciousness” or the “Sacred Tremor of the Heart.” Read more.