Visualize the universe in its entirety, divided into five stages: 

(1) Physical Form 
(2) Spirit (energy particles) 
(3) Wave (spreading wave radiated by the energy particles) 
(4) Truth (Absolute Space, Total Consciousness) 
(5) Mind (phenomenon of feeling-the peripheral state of
Consciousness)

All these stages together are called Nature. The word “Nature” is
packed with meaning. It comprises all things, actions, and results.
Nothing can be singled out as beyond or apart from Nature.

Vethathiri Maharishi, Thathuvagnani. Journey of Consciousness (p. 39).
Vethathiri Publications. Kindle Edition.