He had been sifting his experiences with Helen Schucman through his mind for more than three decades now, Groeschel said, and over the years had realized that any attempt to define them was futile. "What I learned, I think, is that these things can be both real and imaginary, paranormal and spiritual, divine and diabolical. And that when you enter the world of the supernatural, the worst mistake you can make is to impose a ultrarealist point of view. You can't make those kinds of distinctions about experiences that are beyond our comprehension. You have to do as Moses Maimonides instructed and teach your students to say, 'I don't know.'"