An onion is one thing with many layers making up it's body and texture.
You can't confuse it with any other vegetable as it is what it is, no matter how many layers you peel away.
People instantly know it is an onion, no matter which layer they consume.
Maybe this short essay will help you to better understand the onion metaphor.
The Seven Veils of the Onion
By John D. Casnig
The onion is an illuminating bulb. But only by peeling its many layers, can one reveal whether it has a sweet heart or a rotten core. Suspense: thy metaphor is onion!
The onion is used metaphorically to describe sequentially removable layers that conceal an important
something. That is, when we use a metaphor involving an onion - such as "
peeling away another
layer" - we visualize a central concept (a
heart or
core) that is
buried beneath an organized series of increasingly
central issues or arguments.
One progresses
inward in understanding from
surface issues to
deeper truths. When we "
get to the bottom" of something - finding its "
root" or "
kernel" of truth - we are finally exposing that which is most shielded from view. This differs from "opening one's eyes" or "letting some fresh air in", in that the onion offers a
series of seemingly valid
mistruths, rather than a
singular misconception. This also differs from a "
higher truth" in that each step in a heightened understanding does not totally invalidate the prior; rather, it reveals that it was simply
incomplete.
There is nothing of material value between each layer of a metaphorical onion: it is treated as skin upon skin, fortification upon fortification. When an "onion of a story" is formed, we beckon for that certain something that one is "
hiding from us", "
not letting us
in on", "not
disclosing" or "not
revealing". We will
approach the
matter "
from another angle", in the hopes that this will
reveal underlyingissues or help us gain further
insight. And we may often angrily say "chaff!" when rejecting a given unwanted layer, as if an onion is a scintilla of nutritious truth surrounded by unwanted, unpalatable, irritating
dross. In the onion metaphor, that which is not deemed the central truth has no lasting value.
The difference in metaphorical tone between a "
shell", and its
singular breakable encapsulation, and "
onion" and its many
concentric strippable encapsulations, is one of simple fortification versus duplicity. Compare the "
just under the surface" nature of a hidden truth behind such metaphors as "
blanket", "
cover", "
veneer" or "
shield" with the intrigue offered by the many layers of an onion, each layer a wee bit "
closer to the truth". There is far more suspense to the
Dance of the Seven Veils than there is to a towel falling off.
The onion is commonly used as both a metaphor
and a simile, with little - if any - difference in the example it sets. It is emptied of its strong flavor, medicinal value or tear-causing reputation and used as an exclusively geometric form.
Unlike many fruity metaphors, the onion is not used as if bearing a central
nutrition or
seed of life under a simple, necessary level of protection, but rather as a series of false cores, the end of which is likely to offer a truth that is often not so palatable. While the veils of a strip-tease may necessitate a journey through undesirable layers towards the desirable beautiful core, an ugly corporate secret may be veiled away beneath layer upon layer of progressively
less-beautiful mistruths. The duality of the veil is that it can both uglify the beautiful and beautify the ugly. The veil is that layer of onion - flimsy and translucent enough to beg for a deeper investigation.
The onion, then, describes the
progression, rather than the
destination; requiring a separate tone to distinguish the nature or value of the destination itself. It is a
road - a choppy road to an uncertain, secluded destination. Whether a journey along this road results in good news or in bad news, it always results in truth, however dicey.
The onion is the stripper of metaphors - layer upon layer of mystique with no certain end. The truth is, it is the journey to the core that makes the tease.