Our other core need is authenticity. Definitions vary, but here’s one that I think applies best to this discussion: the quality of being true to oneself, and the capacity to shape one’s own life from a deep knowledge of that self. What may not be apparent is that authenticity is not some abstract aspiration, no mere luxury for New Agers dabbling in self-improvement. Like attachment, it is a drive rooted in survival instincts. At its most concrete and pragmatic, it means simply this: knowing our gut feelings when they arise and honoring them.