Albert Barnes Commentary Isaiah 66:9

"Shall I bring to the birth, and not cause to bring forth? saith Jehovah: shall I that cause to bring forth shut [the womb]? saith thy God." — Isaiah 66:9 (ASV)

Shall I bring to the birth? - The sense of this verse is plain. It is that God would certainly accomplish what he had predicted here, and for which he had made ample arrangements and preparations. He would not commence the work, and then abandon it. The figure used here is obvious, but one that does not make very extensive illustration appropriate. Jarchi has well expressed it: ‘Num ego adducerem uxorem meam ad sellam partus, sc. ad partitudinem, et non aperirem uterum ejus, ut foetum suum in lucem produceret? Quasi diceret; an ego incipiam rem nec possim eam perficere?’

Shall I cause to bring forth? - Lowth and Noyes render this, ‘Shall I, who begat, restrain the birth?’ This accurately expresses the idea. The meaning of the whole is that God designed the great and sudden increase of his church; that the plan was long laid; and that, having done this, he would not abandon it, but would certainly effect his designs.