18 And I say to you that you are Peter, and upon this rock, I will build my Church and the gates of Hades will not overcome it. Matthew 16:18 (translated from the NA28 Greek text)
What is the Church? There is much debate and with that, a great deal of unbiblical beliefs about what our Lord was talking about in Matthew 16:18 in the context of μου τὴν ἐκκλησίαν. This literally says in the Greek, “of me the ekklēsian.” The noun ἐκκλησίαν is the Accusative, Singular of ἐκκλησία (ekklēsia), “a called out assembly.” The Accusative case corresponds to the English Objective case….
Here we see that ἐκκλησίαν is in the Accusative case because it has accusative case ending of “ν.” Nouns in the Accusative case are the direct object of the action, which in this sentence is our Lord’s stating, “καὶ ἐπὶ ταύτῃ τῇ πέτρᾳ οἰκοδομήσω” “and upon this rock, I will build…” Therefore, we learn several things that tell us what the Church is and what it is not. It is built upon what our Lord called ταύτῃ τῇ πέτρᾳ and that He is the one doing the building. We learn that the Church is not built on or according to anything else nor is it built by the efforts of men or according the wisdom of this world.