Understanding the Baptism of Fire

Has God left his children defenseless, in a violant and wicked world? Jesus said, (Lu 10:19) "Behold, I give unto you power to tread on serpents and scorpions, and over all the power of the enemy: and nothing shall by any means hurt you."Was he lying or are we just ignorant? And, again he said, (Acts 1:8) "But ye shall receive power, after that the Holy Ghost is come upon you: and ye shall be witnesses unto me both in Jerusalem, and in all Judaea, and in Samaria, and unto the uttermost part of the earth.)We begin to see scriptural bread crumbs that lead us to "Understanding the Baptism of Fire".