What is a spiritual experience?
A spiritual experience is going out of your body, or remembering a past life, or perceiving something as a being and not through normal physical universe channels.
There is a big difference in knowing about spiritual experiences and actually having one. The degree of certainty in one’s own spiritual nature shoots through the roof when you have a spiritual experience.
A spiritual experience is intensely personal. You can’t tell someone, “You are a spiritual being”, when they think they are a body, and have it be real to them. But if that person gets some auditing or does some training in Scientology, and they have their own spiritual experience, then they really know they are a spirit.