He never said He was going to FOUND a church, He said He would BUILD it. There's a difference there.
2) If yes, can His Church teach false doctrine?
There is no entity of the church that can speak for itself; there are believers (or not) who can speak for the church, or who claim to speak for their local assembly, who can be wrong, but that is not the *Church* speaking.
The only things that speak to us are Scripture and the Holy Spirit.
Individuals can teach false doctrine, which is why Scripture is so critically important. It cannot change since it is written down. It's always the same and there to be appealed to if a disagreement arises. That's why IT needs to be the final authority vs. a clique of self-proclaimed mouthpieces for God.
-—He never said He was going to FOUND a church, He said He would BUILD it. There’s a difference there.——
Did he ever complete it, or did he fail?
It’s hard to imagine a Perfect Being not fulfilling his promise.
This interpretation of Scripture is also hard to believe because Jesus commands us to take disagreements “to the church.” I assume that:
1) He was referring to His Church.
2) The Church referred to was visible and identifiable. Otherwise Jesus’ claim would have been nonsensical.
So Jesus founded a visible, identifiable church, to which He commanded us to take our disagreements, which Scripture calls, “the pillar and foundation of truth,” and which “the gates of hell” would not prevail against.
Since we know that Jesus founded a visible Church, and since He stated that the gates of hell would not prevail against it, we an only conclude that,
Jesus’ visible Church exists today.
Since God is Truth, His Church cannot teach false doctrine.
History tells us that this Church is Christ’s Universal (Catholic) Church.