I am he that comforteth you (comp. Isaiah 51:3, and the comment ad loc). Who art thou? Art thou a poor, weak, powerless, unprotected people, which might well tremble at the powerful Babylonians: or art thou not rather a people under the special protection of Jehovah, bound, therefore, to fear no one?
As grass (comp. Isaiah 37:27; Isaiah 11:6-8).