Christ takes the dross out!

(Thomas Watson, "A Plea for the Godly")

Jesus Christ presents the prayers of His people to His
Father. Prayer, as it comes from the godly—is mixed
with sin. But Christ takes the dross out of their
prayers—and presents nothing but pure gold! He dips
the prayers of His people in His blood
—and mingles
them with His sweet incense—and so they are most
fragrant and aromatic to God. A weak prayer being
laid upon Christ as the altar—this altar sanctifies
the prayer!

"Therefore he is able to save completely, those who
 come to God through Him, because He always lives
 to intercede for them!"
Hebrews 7:25