8:34 Afterward - After the altar was built, and the stones plaistered and writ upon. He read - That is, he commanded the priests or Levites to read, Deut 27:14. Blessings and cursings - Which words came in not by way of explication, as if the words of the law were nothing else besides the blessings and curses; but by way of addition, to note that these were read over and above the words of the law.
8:30-35 As soon as Joshua got to the mountains Ebal and Gerizim, without delay, and without caring for the unsettled state of Israel, or their enemies, he confirmed the covenant of the Lord with his people, as appointed, De 11; 27. We must not think to defer covenanting with God till we are settled in the world; nor must any business put us from minding and pursuing the one thing needful. The way to prosper is to begin with God, Mt 6:33. They built an altar, and offered sacrifice to God, in token of their dedicating themselves to God, as living sacrifices to his honour, in and by a Mediator. By Christ's sacrifice of himself for us, we have peace with God. It is a great mercy to any people to have the law of God in writing, and it is fit that the written law should be in a known tongue, that it may be seen and read of all men.