Chapter and verse, please.
According to the interpretation of the Church fathers, like Ambrose and Augustine --- and according to Peter's first Epistle (see above) --the Church is the new ark, like Noah's, which we enter by Baptism, and which alone saves from the Flood.
Matt. 16:18-19
It is impossible to see why Christ would build a Church (which He did), placing the keys to the kingdom of heaven in the hands of Peter (which He did), if the Church were not intended to be His saving help for our salvation.
Pretty obvious. "The Church of the living God, the pillar and foundation of the truth." - 1 Timothy 3:15
He even says those who do not listen to the Church are to be treated as pagans (see tagline.)