entirely possible. but you will allow that they would be straining the definition of charasmatic if they did so, and others who do adhere fully to the charismatic beliefs would be remiss if they did not question such declarations.
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or it could also mean that they have voluntarily turned away from what they once believed into a different way, having left their former beliefs and practices behind.
They still have some mental connection with the tag 'charasmatic', but their belief, practice, and committment is no longer there.
it's kind of like the difference between being a fully dedicated and participating member of a church, and being a seasonal attender.
they follow, but they follow from afar off by their own choice.
i'm hoping here that as a minister you will understand that the questions come out of concern for you and others, and not from a place of derision.
the fact that there are honest questions being raised in regards to some statements of non-belief here in the forum should at least engender a momentary pause, and a bit of self-reflection from all of us as to where we stand now in our beliefs, and whether they have changed since we first declared ourselves as Charismatics or Word of Faith.
if anything this forum should be a means to strengthen our faith and not for causing us to doubt or to change it.
and finally (with a bow of thanks to Neph) we have this:
Romans 14:1-3, Accept him whose faith is weak, without passing judgment on disputable matters. One man's faith allows him to eat everything, but another man, whose faith is weak, eats only vegetables. the man who eats everything must not look down on him who does not, and the man who does not eat everything must not condemn the man who does, for God has accepted him.