Understanding Sons

Τυφλός ἐστι κράζων καὶ λέγων· Υὶὲ Δαβὶδ, ἐλέησον με, ὁ προσευχόμενος σωματικῶς, καὶ μὴ πω ἔχων γνῶσιν πνευματικήν.Ὁ ποτὲ τυφλὸς ἀναβλέψας καὶ ἰδῶν τὸν Κύριον, οὐκέτι υἱον Δαβὶδ, ἀλλ' Υιὸν Θεοῦ ὁμολογήσας προσεκύνησε. Ἅγιος Μάρκος ὁ Ἐρημίτης, Περὶ Νόμου Πνευματικοῦ Source: Migne PG 65.907a

A blind man he is who cries out saying 'Son of David, have mercy on me.' 1 He is praying corporeally and does not yet have spiritual knowledge. When the blind man was healed and saw the Lord, there was no longer 'Son Of David,' but confessing him 'Son Of God,' he adored. Saint Mark The Ascetic, On The Spiritual Law. 1 Lk 18.38