There is, according to Scripture only One mediator between Man and God, the man Christ Jesus.
LOL!!! That refers to *Salvation*: note that Man is in English, "the mass of people" or '"humankind."
Look at it like this:
Like you've never asked anyone to pray for you.
Or prayed for a non-saved friend to come to Christ.
You might even note Stephen in Acts, while being stoned, prayed, "Do not hold this sin against them." That was mediating.