After this the Apostle concludes his epistle with a blessing. He asks the readers to receive his epistle favorably, informs them of his release from prison, άπο λελυμένον, compare Lk 22:68; 23:16 and following, greets the presiders and the whole flock, and adds that the Italian Christians send them greetings (vv. 22-25).
The expression, "God brought up from the dead the great Shepherd of the sheep," is formed according to the pattern of an expression found in the book of the prophet Isaiah (Isa 63:11), which refers to Moses.
The prophet Isaiah, speaking in the name of the Hebrew people, cries out to God: Where is He Who brought them up with the shepherd of His flock, Moses? Having this passage in mind, the Apostle calls Christ the great Shepherd.
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He says that God brought Him out of the realm of the dead, as before He brought Moses out of the sea. God raised Jesus because He shed His Blood for the founding of the New Covenant (vv. 20-21).
The expression αί’ματί is equivalent to the expression in Zech 9:11, bedam beritech. There this expression signifies the basis by virtue of which deliverance from captivity is promised to the Hebrew people.