Verses 1-12
God returns to the temple (43:1-12)
Nineteen years earlier, Ezekiel had seen visions in which God left the temple, went out of Jerusalem to a nearby mountain, then destroyed the city and its inhabitants (see 8:1; 9:1-11; 10:19; 11:22-24). Now, with the new temple established, he sees God returning by the same route, coming to his temple and filling it with glory (43:1-5).
God then told Ezekiel that this temple was to be his earthly dwelling place. It was holy, and his people were not to defile it as their ancestors had defiled the previous temple, through worshipping idols and burying their kings there (6-9). Ezekiel was to describe the new temple to the exiles and explain to them how it was to function. His purpose was to help them understand more of God's holiness, so that they might live obediently and avoid wrongdoing (10-12).
Verses 13-27
Altar of sacrifice (43:13-27)
Positioned centrally in the inner court was the altar of burnt offering. In appearance it looked like three large square boxes placed one on top of the other, with the largest on the bottom and the smallest on the top, giving a stepped appearance. The whole structure was set on a large base built into the pavement. It was so huge that it needed steps so that the priest could climb up to reach the top level, on which the sacrifices were offered (13-17).
The altar was to be dedicated to the holy service of God in a ceremony involving sin offerings (indicating cleansing) and burnt offerings (indicating consecration). Only those priests descended from Zadok were allowed to carry out the actual sacrifice on the altar (18-24). The dedication ceremony was to last one week. After this the altar could be used for normal sacrificial offerings (25-27).