This may have already been said. I did read the other posts, but I admit I skimmed some, and may have missed it.
The bible is not the literature. The bible informs literature. You'd have a hard time quite grasping everything in Milton or Shakespeare without knowing their reference point, and it was often the bible. Especially in Milton's case, I think you may agree.
This is how it was explained to me in my own high-level literature courses, and I can accept that. How true it is, I've no idea. I've not taken a bible as lit course, so I don't know first-hand what's taught.
But, again, it does make sense to have some background in the bible, so that you can better understand much of the literature, the real literature, that followed it and sprang up from it.
ETA: For instance:
Turning and turning in the widening gyre
The falcon cannot hear the falconer;
Things fall apart; the centre cannot hold;
Mere anarchy is loosed upon the world,
The blood-dimmed tide is loosed, and everywhere
The ceremony of innocence is drowned;
The best lack all conviction, while the worst
Are full of passionate intensity.
Surely some revelation is at hand;
Surely the Second Coming is at hand.
The Second Coming! Hardly are those words out
When a vast image out of Spritus Mundi
Troubles my sight: somewhere in the sands of the desert.
A shape with lion body and the head of a man,
A gaze blank and pitiless as the sun,
Is moving its slow thighs, while all about it
Reel shadows of the indignant desert birds.
The darkness drops again; but now I know
That twenty centuries of stony sleep
were vexed to nightmare by a rocking cradle,
And what rough beast, its hour come round at last,
Slouches towards Bethlehem to be born?
Now. Critically analyze that without knowing the referent. I dare you.
