Evolution has ensured that our brains just aren't equipped to visualise 11 dimensions directly. However, from a purely mathematical point of view it's just as easy to think in 11 dimensions, as it is to think in three or four.
- Stephen Hawking
To put it boldly, it is the attempt at a posterior reconstruction of existence by the process of conceptualization.
- Albert Einstein
Abstraction is the condition of the science of metaphysics, but in no way is its content.
- Bishop Fulton J. Sheen
The science of mathematics treats its object as though it were something abstracted mentally, whereas it is not abstract in reality.