Many myths come from human's early desire to explain the origins of life and the natural world. They try making sense of the wonders of the world they precieved. Myths often attempt to answer questions like how did the world come to be, who are we, what is our purpose on earth. People back then couldn't rely on science to giv them the answers sothey told stories to provide an explanation iof where things came form. in this case "[the cattle] are actually a divine gift from the sky god,Enaki."
You'll have to be somewhat more specific with regards to what form of transformation you refer to. Shaper shifter, red riding hood and the wolf, multiple personality disorders, serial killer etc... The one common thread in this context is that appearances are always deceiving so it is always wise to be on your guard in any given situation because absolute safety is an illusion.
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An example of a marvel of nature is when a caterpiller turns into a butterfly
Involuntary is when your not willing to do something. Voluntary is when you're willing to do something.
