Hebrews 10:11-14 And every priest stands daily at his service, offering repeatedly the same sacrifices, which can never take away sins. But when Christ had offered for all time a single sacrifice for sins, he sat down at the right hand of God, waiting from that time until his enemies should be made a footstool for his feet. For by a single offering he has perfected for all time those who are being sanctified.
And honestly, the hyperbole that Catholics engage in when confronted with Scripture that contradicts Catholicism is worthy of an atheist.
Can you respond without getting nasty? First of all, you are interpreting words in a self-serving way: The priests that “Hebrews” is talking about are priests in the temple, who are offering sacrifice in accordance with the prescriptions of the Law. Christian priests on the other hand are offering the sacrifice that Christ offered, that single sacrifice. The two offices, the two commissions are different because they are based on different authority. The authority of Moses on the one hand; the authority of Christ on the other. The priest who stands before the altar offers sacrifice in the same way all must, which is to offer up acts of faith, hope and charity while identifying with jesus as our Lord and brother.