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In my quick painting above I present a scene that might be viewed as subtle and mysterious. Indirectly I imagined a scene where Adam and Haweh are hiding from the Lord after they were deceived by the evil one. We can't see them but God can, as God is omnipresent.
I have often wondered in what manner or form did Satan appear in the garden paradise. I have seen many illustrations over the decades. Most of these tend to represent a serpent hanging from a tree and sweet talking a naked female figure. The word "serpent" (nachash) does appear in the text of Genesis 3, but snakes and serpents are not able to play games and deceive people as this being does so it can not be an actual serpent of a certain species. Some carry the idea of an actual snake or serpent so far as to suggest the fossils of snake like lizards are found in the mid-east and these later lost their legs because of the events in Eden. I think they are going a bit far, although fossils are found everywhere on Earth. God would hardly punish a group of reptiles because of the events in Eden.
Another extreme is the idea that no higher being, like the devil, was in Eden at all, but that the couple fell due to their own ignorance and imaginations. Some would suggest that Adam and his wife were ontologically imperfect and evil because they lacked knowledge. Knowledge helps to perfect a person. Only God is ontologically complete or perfect. Experiencing suffering for a season will eventually make the world more complete. Much can be wrote about these positions. The best possible world is one where suffering exists for a period of time but this has no real bearing on what the devil might look like at times.
I would suggest that Satan appeared in the garden as a being of light, who may have shimmered or glowed off and on and perhaps changing his form, sometimes appearing serpentine. Actually the Hebrew word for serpent (nachash) also means "shinning one". Some scriptures tell us that the devil was an anointed cherub that guards. These "cherubim" were not naked baby-like figures but mighty creatures that appear in much ancient art as great beings (Keruba) that guard royal thrones and such. They sometimes have a lions body and the head an eagle, along with wings. These were evidently modified over time into the griffons which sort of guard the thrones of European kings. Sometimes Seraps are represented as throne guardians (Isaiah 6) and these are often presented as serpentine. Putting aside how literal or symbolic these beings may be, it is not surprising that Satan the Devil might appear in differing ways. I would further suggest that Satan would not have appeared overwhelming to Eve and was shimmering but subtle. He probably would even have acted somewhat friendly (as evil people often do!).
Of course there is also differing positions about the degree of symbolism that exists in the text of Genesis. Crushing the serpents head does not have to be a descendant of Eve stepping on an actual snakes head but rather represents the final defeat of the devil by Christ.