How Sharp can a razor's edge be?
Even the "sharpest mind" can not grasp the ultimate meeting point of the two sides, other than describing it intellectually, with the use of the Brain.
The Brain.... where did it originate?
It began with the Sharpest Edge that the Creator can possibly use to make the Conscious Observer or Self known through Duality.
Thus the One has to be divided into Two.
This polarization requires a Sharp Edge.
Sharp it must be indeed, since the Void or Great Mystery is quite a "dulling" place to be (according to the mindset that wants to be constantly entertained via the "dull outer").
The sharpest edge that cuts throughout is the Moment or eternal Now.
In one moment the One becomes Two and the Two becomes One again.
Now a factor has to be introduced to continue the Sharp Edge, by making the Moment not stop.
CHANGE must occur to let the Sharp Edge continue from "moment to moment".
The Edge must be increasingly sharpened according to its use, as we go deeper into Great Mystery.
Within the Human realm the first sharp edge to be used are the incisors of the mouth, to release the Memory (Link or subtotal of Moments, between the Source and the "latest Moment" of the Eater).
More of the food's Memory is released when the food is further refined by the molars.
From hereon the nature of the Sharp Edge changes.
Duller it becomes in order to catch more of the cuttings by Pressure.
By the 32 teeth correlating with the 32 vertebrae the Sharp Edge is prepared to go Up, after it becomes even more "dull" by the Stomach's and Small-intestine's refining processes.
Then, when the FOOD (= "Substantiated Nothing") is brought to the ultimate Chaos, within....the released Memory becomes the Sharp Edge to "sharpen" the Brain.
Upon the arrival at the head-region the One and Two manifest as Right and Left-brain centred by the Mid-brain.
From here the Consciousness is released, by which the Portal, from where the first Sharp Edge emerged, can be entered with a New Knowledge of the Self who all along did the "cutting".
Now the Self can be more familiar with the Outer.
It knows now how to externally facilitate the refining process of Food.
At first the sharp stone is used to do the "pre-chewing"
Then the use of milling stones to make the cuttings finer.
Next is the use of Fire, where the entrance into the food's centre is deepened.
Last, the use of pottery to Unify the food in preparation for the Inner-unification of Body, Mind and Soul.
Together they correlate to the only ONE Who created the Sharp Edge.
Thus we can not be more sharp than by the Consciousness that All is ONE.