n: the thin, flat, horny plates forming the covering of certain animals, such as snakes, lizards, and pangolins.
Seeing this word reminds me of a Komodo Dragon. While one can scale a ladder, or measure out weights on a brass scale, the sound of the word "scale" [skeyl] suggests something substantial, long or drawn out, and sharp. It has a cadence to it; a sense of finality. The scaling on a Komodo Dragon is a major reason to respect these creatures - in fact, it's one of the similarities they share with the mythical Drakes, and probably why they're named (and known) as such. Scales form a type of exoskeleton that allow for dextrous movement, and provide protection at the same time as they regulate body temperature. They even come together to form coloured patterns (for both camouflage and mating), as is the case with butterflies: they have (itty-bitty) scales on their wings.
I think about the idea of "protection" in context. Scaling on an animal can protect them by providing a hard outer armour, but can also hide them in their surroundings or provide visual clues to their would-be predators that they aren't to be messed with. Human beings are hardly so simple in their communication, but could our vulnerable, fleshy bodies be scaling for our minds? A person's mind has capabilities for many things, and we've all known ourselves to be cold and unflinching, sometimes cruel. We've also, I'm sure, met a moment where our minds have been vulnerable, or self-destructive, without a way to "turn off". Could it be that these bodies of ours are soft for a reason, and even our emotions (our "hearts") provide protection for our mind from outer stimuli by distracting us with pain and pleasure on a physical level?
A lizard can avoid overloading its body temperature by regulating the amount of sunlight it takes in - its scales help to do this, and evolution has shown that it's not just in small animals, either. A Stegosaurus had a ready-built system to regulate its temperature (which is great, being cold-blooded and the size of a house), and I can't imagine why humans wouldn't have milllions of years of evolution behind them when it comes to protecting what lets them survive. Could our minds themselves have a type of scaling to keep our intellect - the one thing that might save our species in a world where we're physically vulnerable - intact?
Think about why a lizard might have scales instead of an exoskeleton. Unlike a beetle, or a cockroach, a lizard needs the agility and dexterity to climb thin branches and move quickly away from predators that even relatively thick armour wouldn't save it from. A beetle has the option of flight, a smaller body mass allowing it to fall relatively greater distances without regards to landing smoothly, and the advantage that its place on the food chain puts it below many of the "much larger" predators' notice, but above the millions of other insects that might try to harm it. On the insect's level of combat, that exoskeleton combines with a beetle's size to be very important, whereas a lizard might not have a fair fight with most amphibians or mammals it shares a habitat with, that might acquire a taste for its species. In the long run, a lizard does better using a nonlinear form of protection, while still requiring something more resilient than a soft skin. Though, in a straight comparison, a lizard's skin protects it from the same insects the beetle's exoskeleton does. Does this line of thinking give way to the idea that humans have mental scaling (even if it's just as simple as "bees hurt, stay away") to protect them from the bottom portions of the food chain, but that are still flexible and agile enough to nonlinearly protect us from our own predators, tangible and otherwise? Could we have reached an evolutionary phase where psychic predations and overloads of stimuli threaten our well-being (and thus, our lives) in such a way that we require more than just intuition and an epidermis (or anti-bodies) to stay alive as a species on Earth?
If all of this has a point, it's to say that mental health is a quality just as valuable - and just as vulnerable - as bodily health. Motivation, drive, and willpower are perhaps the squishy center of our being, and are targetable prey for the world we live in, in a way that ambulation, strength, and fertility couldn't be. A reptile sheds its skin (and its scales) to make way for thicker, sharper, and correctly-sized replacements, all to better protect itself in the long run. We can't forget to do the same, even if we have to survive the period where our fleshy interior is raw and exposed, while our scaling grows anew.