Plato's position is that absolute truth can be found using deductive reasoning. This means that deductive reasoning can be used to constrain God and reality. Of course this is unacceptable both to those with a sound religious background and to those with a sound scientific background.
He affected Christians' view. Edward Gibbon says in the preface to the "History of Christianity":
"If Paganism was conquered by Christianity, it is equally true that Christianity was corrupted by Paganism. The pure deism of the first Christians[belief in only ONE God]...was changed, by the Church of Rome, into the incomprehensible dogma of the Trinity. Many of the pagan tenets, invented by the Egyptians and idealized by Plato, were retained as being worthy of belief."
Watch this:
https://www.youtube.com/watch?v=rpjrzNPSEb8
