4. Another symbolical act performed at the same time as the former, in vision, not in external action, wherein it would have been only puerile: narrated as a thing ideally done, it would make a vivid impression. The second action is supplementary to the first, to bring out more fully the same prophetic idea.
      left side--referring to the position of the ten tribes, the northern kingdom, as Judah, the southern, answers to "the right side" (Eze 4:6). The Orientals facing the east in their mode, had the north on their left, and the south on their right (Eze 16:46). Also the right was more honorable than the left: so Judah as being the seat of the temple, was more so than Israel.
      bear the iniquity--iniquity being regarded as a burden; so it means, "bear the punishment of their iniquity" (Nu 14:34). A type of Him who was the great sin-bearer, not in mimic show as Ezekiel, but in reality (Isa 53:4, 6, 12).

JFB.