9. Then … call … answer—when sin is renounced (Isa 65:24). When the Lord's call is not hearkened to, He will not hear our "call" (Ps 66:18; Pr 1:24, 28; 15:29; 28:9).
putting forth of … finger—the finger of scorn pointed at simple-minded godly men. The middle finger was so used by the Romans.
speaking vanity—every injurious speech [Lowth].