Mt.16.19 I will give you the keys of the kingdom of heaven; whatever you bind on earth will be bound in heaven, and whatever you loose on earth will be loosed in heaven.
Christ addressed Peter alone. The three words "you" in this passage are all singular. Christ was not speaking of prayers by members of the "universal, catholic, small 'c'" Church. He was speaking specifically to Peter and gave him "keys" for a single purpose. I explained what those "keys" were for in post #169.
Oh?
A GROUP cannot be addressed as singular?
If Pete got this 'honor' from Christ; where is the expected uproar from the others who got left out?
There wasn't ANY of them so 'holy' that they'd accept this without murmuring!