Exodus 39 - The articles of clothing for the priests is detailed. Great care was given to make these clothes exactly as God had instructed Moses. As this chapter comes to a close the Tabernacle and all the materials needed for it are completed and presented to Moses. He blesses all those who worked and they would have the joy of seeing the end result as God's people would worship and the priests would perform their duties.
Exodus 40 - As you read this chapter God gives Moses a step-by-step instruction on erecting the Tabernacle. Then you see Moses follow these instructions to the letter. After all the work is done Moses anoints the structure to set it apart as holy unto the Lord. Then Aaron and his sons are dressed in their proper attire. When this chapter ends God shows His approval by filling the Tabernacle with His glory. Moses can't stay in the structure but has to leave and observe this glorious display from outside.
As Exodus comes to a close a significant milestone has been achieved. God's presence in the Tabernacle fulfills His desire to dwell with His people. And today He delights to dwell in the hearts of all those who have placed their trust in Him.