Jamieson, Fausset & Brown

double--Instead of your past share, ye shall have not merely as much, but "double" as much reward (Isa 40:2; Zac 9:12; compare the third clause in this verse). confusion--rather, "humiliation," or "contumely." rejoice--They shall celebrate with jubilation their portion [MAURER]. Transition from the second to the third person. in their land--marking the reference to literal Israel, not to the Church at large. everlasting joy-- (Isa 35:10).