For years he lived the ascetic life in a crude tree- house he had fashioned in the branches of an almond tree. Then he moved to Thessaly, where he continued his life of fasting, prayer and vigil, cleansing his soul and being made worthy to perform many miracles. Once, when the Emperor Justinian visited him, he took a live coal in his bare hand and censed the Emperor. The Emperor, seeing this, bowed to the ground before David. He reposed in peace.