All materialization in the natural world are the manifestation and derivation of the inherent duality of the physical universe. Duality is the subjective state of mind, while the mind conscious assess the input from the world from an egocentric viewpoint.
In order to truly understand the root of our sufferings, we must recognize the nature of our own mind and how our response the outer world impact our life journey. We are the product of our own doings. We create our future circumstances with each choice we make, along the life path.