The word “spiritual” has at least four major usages:

1. A spiritual state or peak experience (e.g., nature mysticism).
2. The highest levels in any developmental line (e.g., transrational cognition, transpersonal self-identity, etc.).
3. A separate developmental line itself (e.g., Fowler’s stages of faith).
4. A particular attitude or orientation, like openness, wisdom, or compassion, which can be present at virtually any state or stage.