Go through, go through the gates. The speaker returns to the period of the exile, and exhorts the people to pass forth from Babylon, and speed on their way homewards (comp. Isaiah 48:20; Isaiah 52:11).
Some of them are to clear away obstacles, others are to bring materials and construct a highway along which the stream of emigrants may march (comp. Isaiah 57:14), while a third body removes such stones as might cause stumbling, and a fourth lifts up a standard to direct the march.