“Moreover, every single priest stands daily,
ministering and offering the same sacrifices, time after time,
which can never take away sins,
but he, having offered for all time a single sacrifice for sins,
sat down at the right hand of God.”
Israel’s priests could not sit down after they offered the sacrifices commanded by the law of Moses because those sacrifices had to be repeated, over and over again, generation after generation. But when Jesus ascended into heaven and offered himself to God to make atonement for our sins, he sat down because his offering of himself was perfect and is eternally in force.