Thomas Hübl has many good explanations on the level of psychology and spirituality, to which I mostly agree. My use of words and concepts to describe the processes is different, and certainly not so ‘spiritual’, but I like most of his messages.
Here he talks about Inner Coherence, which I name as Inner alignment in my book; for the rest there is hardly any difference.
Susanne Cook-Greuter is an academic who has done years and years of research on different levels of adult development. Here she shares some of her wisdom, gathered over the ages, and describes the worldview where we can get to… creativity with no end goal, with no attachment…