(Sahṛdaya): “With the Heart,” an expression of spiritual aliveness, enthusiasm, and vigor. According to Kashmir Shaivism, a life lived in the Heart is sahridaya. It is a life in which spanda (waves of dynamism issuing forth from the Heart) is a source of spontaneous expression. The absence of sahridaya (spiritual dynamism) causes apathy, lack of vitality, distrust, and inertia. It is the cause of spiritual inefficiency and lack of focus.