So this is Peter, eh??? He'll be a nail in a firm place??? So what happens when you actually read the whole thing in context??? And you include the verse you left out???
Isa 22:25 In that day, saith the LORD of hosts, shall the nail that is fastened in the sure place be removed, and be cut down, and fall; and the burden that was upon it shall be cut off: for the LORD hath spoken it.
What's that all about in the reign of Peter and subsequent papal authority???
There it is: the keys, the delegation of authority, the opening and closing. The commentaries from Clark and the rest, here (LINK) are especially helpful --- and no, they're not Catholic commentaries. It is simply not debatable that the keys are the ensign of authority.
The fact is: the keys in Matthew were given to all the disciples and apostles...And they were not given for the entrance to heaven but the Kingdom of heaven...
And we can further see by comparing scripture with scripture, these keys are not just authority but authority of knowledge...
Luk_11:52 Woe unto you, lawyers! for ye have taken away the key of knowledge: ye entered not in yourselves, and them that were entering in ye hindered.
Mat_16:17 And Jesus answered and said unto him, Blessed art thou, Simon Barjona: for flesh and blood hath not revealed it unto thee, but my Father which is in heaven.
This knowledge was revealed to Peter and the others alowing them to accept and reject souls into the Kingdom based on revealed knowledge from above...
How blessed it is to put your faith upon Jesus, and Jesus alone!
Why would anyone seek after Mary, Peter or any other human authority?
How DARE you point out Cherry picking!!