I do believe that demons/ evil spirits can and do take fleshly form. Look at the instance where Christ himnself cast out demons out of a man, and the demons asked if they could posess the bodies of the pigs.. Christ allowed it and the demons posessed the pigs and ran off a cliff or something and died. (Sorry for the rough paraphrase).
I agree with 4inchT100 - That being a "True Christain" is all about our personal relationship with Jesus Christ who is God come in the Flesh, God Himself. And that if we really are a true christian that we are a regenerate person that produces fruit of the Holy Spirit. Its not enough to say we believe and then go on living in sin. The bible says that many will say Lord, Lord.. but Christ will say He never knew them. To be truly saved is to repent and turn away from sin and realize that its only through the atoning sacrifice that we can return to be with God. Its not about following some organizations set of rules... or any rules that man has made. Its about following what the Bible says because its the Word of God. But the Bible also says that we should not forsake the fellowship with the saints, being that we should find a good body of believers that helps us grow in our walk with the Lord. Wether it be methodist, Baptist, non-denomination.. whatever... because all these different denominations hold to the core of Christain creeds about the trinity and salvation. Its only when the Word is perverted that it causes many to be lost.. such as mormonism, jehovahs witnesses, scientology, masonry.. whatever.. Its good to have differences within the church, because if we didnt what would challenge us to learn and grow in our walk and our knowledge of Gods word.. its all good until it causes division among the body.
