But ¹  now Jesus ²  has obtained a superior ministry, since ³  the covenant that he mediates is also better and is enacted ⁴  on better promises. ⁵ 

So if perfection had in fact been possible through the Levitical priesthood – for on that basis ¹  the people received the law – what further need would there have been for another priest to arise, said to be in the order of Melchizedek and not in Aaron’s order?