Every valley will be filled. Every mountain and hill will be brought low. The crooked will become straight, And the rough ways smooth.
and the rough ways shall be made smooth; and men of rough tempers, comparable to lions and bears, shall become quiet and peaceable, smooth and easy; and moreover, whatever difficulties were in the minds of men concerning the Messiah, the end of his coming, and the nature of his kingdom; and whatever impediments were in the way of embracing him when come, should now be removed at least from many persons: R. David Kimchi, a very noted Jewish commentator q, acknowledges that the whole of this passage is to be understood, דרך משל, "by way of parable", in a mystical and figurative sense.