Because you say so?
But here's an interesting thing to me. It is a ganerally accepted notion of the Buddhadharma that true wisdom will decrease over time, that as the interval lengthens between the paranirvana of the Shakyamuni and the present, the truth will be diluted and dissipated.
And here there are hints of the same kind of thought among Protestants. And I suggest, as a mere conjecture, that Our Lord promised that the Holy Spirit would guide, well, someone, into all truth -- though he had many things to say which could not be borne at the time. So the Christian "Scheme" seems to be that we will corporately will grow in knowledge of the truth - at least that's what the Bible, but not the Protestants, say.
The Protestants seem to think like Buddhists in this regard. The Muslims, on the third hand, seem to want to keep everything frozen in time and despise reason while making their book the ultimate authority.
Because you say so?
No, because God says so...One had to be a witness of the crucifixion/resurrection to be an Apostle...
Your church did write the scripture, right??? And you do believe your church, right???