The Bible says, «whosoever believeth on me shall not perish but have eternal life», that is the definition of who can be a Christian (follower of Jesus Christ). (religion.blogs.cnn.com)
those who believe, and those who are Jews, and Sabaeans, and Christians — Whosoever believeth in Allah and the Last Day and doeth right — there shall no fear come upon them neither shall they grieve. (religion.blogs.cnn.com)
You see Kerry, «For God so LOVED the world that He gave His only begotten son that whosoever believeth in Him shall not perish but have everlasting life.» (religion.blogs.cnn.com)