Satan

Satan is first introduced in the form of a serpent. Of course, one could ask many questions. Did Satan take over the body of the serpent, and that's why it could talk? Wouldn't have that seemed weird to Eve though? Did all the animals talk before the fall, and that just made it seem normal that the serpent came up to her and started talking? Most of the question are irrelevant really--someday I'll know in heaven. What I take from this first mention, is that Satan presents himself in many reasonable, attractive, acceptable forms. We must be vigilant.