46:4-5 God's presence in Jerusalem was similar to that of a refreshing life-giving river rather than the raging sea (v. 3; cf. Isa. 8:6; 33:21). Old Jerusalem, of course, had no literal river flowing through it (cf. Rev. 22:1-2). Because God abode in the city, it enjoyed great security. As time passed, however, God left the city because His people forsook Him (Ezek. 8; 10).
46:6-7 When nations lifted themselves up in opposition to God and Israel, the Lord overthrew them (cf. Ps. 2:1-2). His mighty word even caused the earth to melt, a figurative description of the awesome power of God (cf. Gen. l). Therefore the God who preserved Jacob would also protect the Israelites. He controls the unseen armies of heaven. He is a Person to whom His people can flee for refuge when enemies attack.