17. yet—though heretofore lying in abject prostration.
My cities—not only Jerusalem, but the subordinate cities of Judah. God claims them all as peculiarly His, and therefore will restore them.
through prosperity … spread abroad—or overflow; metaphor from an overflowing vessel or fountain (compare Pr 5:16) [Pembellus]. Abundance of fruits of the earth, corn and wine, and a large increase of citizens, are meant; also spiritual prosperity.
comfort Zion—(Isa 40:1, 2; 51:3).
choose—(Zec 2:12; 3:2; Isa 14:1). Here meaning, "show by acts of loving-kindness that He has chosen." His immutable choice from everlasting is the fountain whence flow all such particular acts of love.