What happened to that one true congregation? Did it become the mighty Catholic Church? Did it evolve into the denominational, fragmented Protestant church system that we see today? Or did something else happen?
consider what Jesus Christ himself said would happen. Jesus expected his congregation to disappear from view and that he would allow such a sad situation to continue for centuries
Identifying his congregation with "the kingdom of the heavens," he said: "The kingdom of the heavens has become like a man that sowed fine seed in his field. While men were sleeping, his enemy came and oversowed weeds in among the wheat, and left. When the blade sprouted and produced fruit, then the weeds appeared also. So the slaves of the householder came up and said to him, Master, did you not sow fine seed in your field? How, then, does it come to have weeds? He said to them, An enemy, a man, did this. They said to him, Do you want us, then, to go out and collect them? He said, No; that by no chance, while collecting the weeds, you uproot the wheat with them. Let both grow together until the harvest; and in the harvest season I will tell the reapers, First collect the weeds and bind them in bundles to burn them up, then go to gathering the wheat into my storehouse."Matthew 13:24-30
Jesus explained that he was "the sower." "The fine seed" pictured his genuine disciples. His "enemy" was Satan the Devil. "The weeds" were counterfeit Christians who infiltrated the early Christian congregation. He said that he would let "the wheat" and "the weeds" grow together until "the harvest," which would come at "a conclusion of a system of things." (Matthew 13:37-43)