Some organizations find it hard to embrace personal mastery because as a concept it is intangible and the benefits cannot be quantified; personal mastery can even be seen as a threat to the organization. This threat can be real, as Senge points out, that 'to empower people in an unaligned organization can be counterproductive'. In other words, if individuals do not engage with a shared vision, personal mastery could be used to advance their own personal visions. In some organizations a lack of a learning culture can be a barrier to learning. An environment must be created where individuals can share learning without it being devalued and ignored, so more people can benefit from their knowledge and the individuals becomes empowered. A learning organization needs to fully accept the removal of traditional hierarchical structures.