From Mukunda Stiles:
Svastha - health - literally means "established in the Self"...and "true health is a coming home to yourself". Stiles interprets a verse from the Siva Sutras: "one who is established in a comfortable [stable] posture, while [focusing] on the Inner Self [underlying vibration of Life], naturally becomes immersed in the spontaneous arising of the Heart's ocean of bliss"
Joyful exploring!