But when this priest had offered for all time one sacrifice for sins, he sat down at the right hand of God. -- Hebrews 10:12
Why'd he sit down? Because the work of salvation was done. "It is finished."
How silly, then, are we when we scrape our meager religion into bowls to present to God as if this collection is needed to make up some perceived difference? As if the work of Christ is a down payment and now we're on the installment plan. The work of salvation is done; the gospel creates sabbath from works righteousness, or should anyway.
When we work as if our salvation or God's approval hinges on what we do, it is like thinking God left something undone in those 6 days of creation. He stopped too soon. The rest came too early.
We don't think that. We don't think we can improve upon God's creation. So why do we think we can improve upon his redemption? Christ is seated because the work lacks for nothing and always will.