Spiritual Forum. Org

To conservative Protestants, a Christian is defined according to their salvation status. Their definition is "true" to them, because it agrees with some of their foundational beliefs: that the Bible is inerrant, that salvation is by grace, and that one must be "born-again" to be saved and avoid eternal punishment in Hell.
To Roman Catholics, a Christian is defined according to their baptism status. Their definition is "true" to them, because it agrees with their fundamental beliefs, including their understanding of the Bible, the declarations of many Church Councils, the statements of many popes, and their church's tradition.