When Satan first emerged on the scene of humanity, he immediately questioned God's trustworthiness. That act alone should alert us to his dangerous character. Appearing in the form of a sly serpent in the garden of Eden, he became the conduit through which sin was introduced into the then-perfect human race. Thankfully, God knew it was coming and already had a plan for redemption, which He laid out and began enacting in Genesis 3. The same chapter in Scripture where sin is first introduced is also the first instance where blood was shed to cover sin.