– In which direction?

– I thought we were talking about a glass ceiling, not a glass bottom…

You see, we have to deal here with the difference between depth and thickness.

A ‘coat of paint’ has a certain thickness – we know where it starts and where it ends, while a sea has a certain depth. We know it’s there, we know where it starts – at the surface of the water, but we’re never exactly sure where it ends. How deep it actually is!

Another way to put this would be to compare the depth of human consciousness with the thickness of the cerebral cortex.
The depth of the reality we perceive using our brain and the thickness of the cerebral tissue where this perception takes place.
The depth of the reality we, humans, have built during our history inside the relatively shallow portion of the Earth where we feel at home.

We use a small number of phonemes to communicate among ourselves.
A relatively small number of words to convey hugely complicated concepts.
Two digits, 0 and 1, to build artificial intelligence… inside a wafer thin ‘slab’ of doped silicon.

– OK, enough introduction. How about making in clear what you really meant?
A glass ceiling or a glass bottom?

Whether it is a glass ceiling or a glass bottom is a matter of perspective.
A matter of where you are when looking at it. Above or below.
The only thing which really matters being the fact that you see it despite of it being made of glass.
Despite it being transparent.

Transparent to our eyes but not to our conscious mind.

– But if it’s already transparent, why is it such a big thing to break through it?
We already know what’s behind/above it…

Seeing is not the same thing as knowing… just as 0 and 1 scribbled on a computer chip is not enough to make an intelligent computer…