Indeed... "he that has an ear let him hear what the Spirit is saying"..(multiple entrys).. even more passages the same is implied or metaphorically intoned..
Listening with both ears or seeing with both eyes or detecting the odor of logic with both nostrils.. can increase your ability to absorb information/data/data sets..
Especially the hidden message(s) of metaphorical data..
"Literal" truth seekers(opposed to metaphorical) can be inhibited..
There is a place for both wave-forms of data..
Why do ye not understand my speech? [even] because ye cannot hear my word. John 8:43
My sheep hear my voice, and I know them, and they follow me: - John 10:27