Some appear to imagine that, while religious questions today are ambiguous and while contemporary religious claims are disputable and usually disputed, matters would have been much clearer had they only lived back in the days of Jesus.
Passages such as this one prove that, on the whole, the imagined clarity didn’t exist then, either.
In this life, absent divine grace, we mostly see through a glass, darkly.
That’s pretty plainly the way it’s supposed to be.