For D. H. Lawrence affirmation of life and the body and human sexuality were essential. We can learn from all of these positions, and from other humanist forms of ethics. But what pantheism can provide is a solid religious basis for ethics. In the case of environmental ethics and of human rights that basis is far more solid than anything that traditional Western religions can offer. Grounding ethics in reality.
Ethics is perhaps the most difficult area of philosophy.
It is not like logic, where you can build up a set of rigorous arguments based on solid premises. It is not like science, where you can deduce theories from what you discover about reality. It is deeply affected by varying human passions, pleasures, social structures. It is an area of intellectual risk, of leaps in the dark, and of unending controversy. One of the most fundamental problems of any ethical system is how to ground its principles.