De Boer in this specific piece on shamanism I thought was worth highlighting, for this is one of the many pathways.

Some quotes follow:

The shamanic personality is not only a practitioner of the sacred, but one whose central role is healing through contact with the forces of the natural world.

There aren’t ready-made answers. We must each find our way, and reflect on what it means for ourselves, our families, our communities, and our culture.

His article, New cosmology: A great story — Our Common Story not only ties in with Swimme, but referes to him. His main site is here.