After becoming a monk, Saint David, inspired by the lives of the holy stylites, climbed a tree near the monastery Church and lived on one of its branches for three years as the first of the dendrites (tree dwellers). Lifted up on the tree in imitation of Christ Jesus, he did battle with the passions, crucifying the flesh through asceticism. He constantly meditated on Holy Scripture and the Lives of the Saints for spiritual sustenance, and cried out hymns of praise like a bird bursting its throat in song. Having been lifted up both physically and spiritually, he drew men unto himself and guided them to the Lord as their spiritual father. Coming down from his tree for this purpose as well as and to minister to the people of Thessalonica, God gave him grace to heal all manner of sickness, restore sight to the blind, and drive out demons by calling on the Name of the Lord. Thus, he became a guardian angel in the flesh for the city and the whole region, his cell always being filled with a radiant light at night as he visited with God face-to-face like Moses. Later in an appearance before the Senate in the imperial city, David picked up a coal and used his hand as a censer to cense the faithful there showing that he had become a flaming pillar of love for God.
Hymnography
Since thou hadst mortified thy bodily members upon the earth, O Father, thou hadst Life dwelling in thy heart, even Christ, Who deadened the power of the devil who made mankind subject to death.
(Ode One, Second Troparion; Orthros Canon)
In obedience to the Master’s laws, O righteous David, thou didst take thy cross on thy shoulders following in his steps; and being lowly in humility, thou didst cast down the destroyer’s lofty pride.
(Ode One, Third Troparion; Orthros Canon)