3. thread—like a delicate fillet. Not thick and white as the leper's lips (type of sin), which were therefore to be "covered," as "unclean" (Le 13:45).
scarlet—The blood of Jesus Christ (Isa 6:5-9) cleanses the leprosy, and unseals the lips (Isa 57:19; Ho 14:2; Heb 13:15). Rahab's scarlet thread was a type of it (Jos 2:18).
speech—not a separate feature from the lips (Zep 3:9; Col 4:6). Contrast "uncircumcised lips" (Ex 6:12). Maurer and Burrowes translate, "thy mouth."
temples—rather, the upper part of the cheek next the temples: the seat of shamefacedness; so, "within thy locks," no display (1Co 11:5, 6, 15). Mark of true penitence (Ezr 9:6; Eze 16:63). Contrast Jer 3:3; Eze 3:7.
pomegranate—When cut, it displays in rows seeds pellucid, like crystal, tinged with red. Her modesty is not on the surface, but within, which Jesus Christ can see into.