[dan1123]

"(1) Whenever Peter is referred to in this passage it is in the second person ("you"), but "this rock" is in the third person. (2) "Peter" (petros) is a masculine singular term and "rock" (petra) is feminine singular. Hence, they do not have the same referent. And even if Jesus did speak these words in Aramaic (which does not distinguish genders), the inspired Greek original does make such distinctions. (3) What is more, the same authority Jesus gave to Peter (Matt. 16:18) is given later to all the apostles (Matt. 18:18). (4) Great authorities, some Catholic, can be cited in agreement with this interpretation, including John Chrysostom and St. Augustine. The latter wrote: "On this rock, therefore, He said, which thou hast confessed. I will build my Church. For the Rock (petra) is Christ; and on this foundation was Peter himself built."[13]"

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[annalex]

The authority of the Church is not based solely on the renaming of Peter episode, but also, and, in fact, primarily on

15 But if thy brother shall offend against thee, go, and rebuke him between thee and him alone. If he shall hear thee, thou shalt gain thy brother. 16 And if he will not hear thee, take with thee one or two more: that in the mouth of two or three witnesses every word may stand. 17 And if he will not hear them: tell the church. And if he will not hear the church, let him be to thee as the heathen and publican. 18 Amen I say to you, whatsoever you shall bind upon earth, shall be bound also in heaven; and whatsoever you shall loose upon earth, shall be loosed also in heaven

(Mt 18)

The unique authority of Peter is, of course, evident in several gospel episodes beside the renaming; he is promised the keys to the Kingdom of Heaven and the power to bind and loose is first given him; Christ promises to pray for him personally at the Last Supper so that he, Peter, may not fail and convert his brethren; Peter is charged with feeding Christ's sheep; Peter converts the first Gentile and it is his vision that makes a clean break with the Jewish ceremonial and dietetic law.

But what about the renaming episode? You acknowledge that the actual conversation takes place in Aramaic and is not recorded at all, so we are dealing with the limitations of the Greek translation. The patristic Greek has only feminine for "rock", "petra"; the diminutive "petros" is not recorded in the Koine Greek. So, St. Matthew had to fit the feminine "petra" into the masculine name, so he writes "petros". Naturally, the pronouns have to agree with the word they point to and the grammar of the phrase (like in any language), so since Jesus is talking to Peter about a rock (and not to a rock about Peter), the pronouns are "thou" (soi) and "this" (taute te).

This is really a first, rejecting the scripture for being too grammatical, then calling the normative interpretation "ungrammatical - take a cigar.