What is true for you is what you have observed yourself. And when you lose that, you have lost everything.
What is personal integrity? Personal integrity is knowing what you know. What you know is what you know and to have the courage to know and say what you have observed. And that is integrity and there is no other integrity.
Of course, we can talk about honor, truth, nobility—all these things as esoteric terms. But I think they would all be covered very well if what we really observed was what we observed, that we took care to observe what we were observing, that we always observed to observe. And not necessarily maintaining a skeptical attitude, a critical attitude or an open mind—not necessarily maintaining these things at all—but certainly maintaining sufficient personal integrity and sufficient personal belief and confidence in self and courage that we can observe what we observe and say what we have observed.
Nothing in Scientology is true for you unless you have observed it and it is true according to your observation.
That is all.
L. Ron Hubbard