There is so much Ancient Greek its hard to paint them all with the same brush. Koine (biblical) Greek is very simple and a modern speaker can get the gist, but

There is so much Ancient Greek its hard to paint them all with the same brush. Koine (biblical) Greek is very simple and a modern speaker can get the gist, but polyphonic Greek in the flavor of Sappho or the Iliad would be very, very difficult for a modern speaker to understand. Meanwhile, the Torah is still taught in full, in (roughly) the original; it is not at all surprising someone can still read it fully with modern education.