Have them make an ark of acacia wood

Exodus 25:10-22

Have them make an ark of acacia wood—two and a half cubits long, a cubit and a half wide, and a cubit and a half high. Overlay it with pure gold, both inside and out, and make a gold molding around it. Cast four gold rings for it and fasten them to its four feet, with two rings on one side and two rings on the other. Then make poles of acacia wood and overlay them with gold. Insert the poles into the rings on the sides of the ark to carry it. The poles are to remain in the rings of this ark; they are not to be removed. Then put in the ark the tablets of the covenant law, which I will give you.

Make an atonement cover of pure gold—two and a half cubits long and a cubit and a half wide. And make two cherubim out of hammered gold at the ends of the cover.

The cherubim are to face each other, looking toward the cover. Place the cover on top of the ark and put in the ark the tablets of the covenant law that I will give you. There, above the cover between the two cherubim that are over the ark of the covenant law, I will meet with you and give you all my commands for the Israelites.

Portable, prefabricated tent shrines similar to God's Tent were constructed in Egypt even earlier than this. Here, although the description is detailed, some practical points are missing it is not a complete blueprint. The roof of the tent, for example, may have been flat or raised with a ridge-pole.

Why?

The Ark is an important part of the Tabernacle. So God shows the material and shape and size of it. 

Between two cherubim over the ark is the place God will meet Moses and give commands for the Israelites.

The Ark is the symbol place of the Lord in the world with his people Israelite. Inside the ark is the tablets of the covenant law, it is the word of the Lord.

Pure gold means holy and forever of the Lord.

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神指示摩西約櫃的做法。37章講製造過程。

施恩座是一塊用金做的板子，與約櫃的長寬一樣，等於是約櫃上方的蓋子。約櫃裏面放十誡的石板，律法要定人的罪，施恩座把律法的罪蓋起來，讓神不再追究人的罪。上方有金牙邊在四角，施恩座不會滑出來，石板不會露出來，控告人。即因信稱義的真理穩固，不會改變。

施恩座上有基路伯，基路伯有翅膀，表示神的恩典不停止。基路伯看贖罪的血，贖罪的血撒在施恩座上而不看東邊，不看人的罪。

神會見人，是在施恩座上，位置沒有很高，與人親近。會幕最重要的是約櫃，是神與人同在，神向人說話的地方。啟示時最早說約櫃，製造時卻最後才做約櫃，會幕好了，約櫃可以被進去會幕。

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How?

God's word is the power and the love of his people.