The author is still speaking about Jesus’ role as the ultimate high priest. The author also begins to speak about how the new covenant is superior to the covenant God made with Moses. (See: rc://en/tw/dict/bible/kt/newcovenant and rc://en/tw/dict/bible/kt/covenant)
Some translations indent each line of poetry to make it easier to read. The ULB does this with the poetry in 8:8-12, which is quoted from the OT.
The author mentions the new covenant and discusses Jesus’ relationship to it. Israel’s relationship to the new covenant is unclear and the subject of much debate.
The author begins to speak using the pronoun “we.” It is uncertain who else this includes.