Existence is pretty incredible when you consider that everything in the universe is made of similar material: energy and matter. The smallest atoms and gases interact and combine together to assemble bigger more complex structures. All species share in common a cellular foundation. Similar cells join together to create tissue, tissues form to create organs, organs work together to create organ systems, and multiple organ systems work harmoniously to establish an organism.
The development of the brain and nervous system create idiosyncrasies in species. Human beings are unique to other mammals in that our species has developed and established a system of living separate from nature, which can (and does) conflict with our ability to thrive physically and emotionally as individuals and as a species.
The purpose of most life on Earth is to ensure survival. Humans are no different. Our external interactions influence the internal interactions of our body systems. Depending on the experiences we have as these systems develop, each individual responds to situations based on what the nervous system deems necessary to survive. Playfulness, relaxation, anxiety, fear, anger, love, hate, compassion, empathy and other emotions and behavioral states occur as a result of our nervous system trying to protect us and promote our survival.
The universe is a chaotic collision of interacting organisms and particles. So much in this life is beyond our control. What we are able to do is create space for introspection, to learn and explore ourselves and our world so we can better navigate the constant change of existence. Expanding our understanding and creating connections between ourselves and our world helps establish harmony of being for ourselves and others reaffirming that everything in the universe is part of something larger.