[Iscool]

Christ is the only mediator, but He was free to decide how His mediation would be applied to us. The Lord chose to use priests of God to carry out His work of forgiveness - John 20: 21-23.

I disagree with you...Jesus did not use priests...But he did commission the apostles, temporarily, to carry out the mission of remitting and retaining sins...

When Jesus was seated on the Heavenly Throne however, and the Holy Spirit showed up as the comforter and indwelt all believers, things changed...

[NYer]

Jesus did not use priests...But he did commission the apostles, temporarily, to carry out the mission of remitting and retaining sins...

Temporarily?

When the crowds saw this they were struck with awe and glorified God who had given such authority to human beings.
Matthew 9:8

This verse demonstrates that Christ gave authority to men, including that of forgiving sins. You agree that he commissioned the apostles to carry out that mission. Where in Scripture is the gift of authority to forgive sins taken away from the apostles or their successors?

[Campion]

But he did commission the apostles, temporarily, to carry out the mission of remitting and retaining sins...

Nothing in Scripture says that ministry was temporary, and the Church Christ founded through those same Apostles has never understood it to have been.