Why can we see? Why can we hear? Why can we speak? Why can we stand, walk, jump, and sit?
In other words, how do we live in this world?
Thanks to science and technology, we know now.
We can see because we have a pair of eyes. We can hear because we have a pair of ears. We can speak because we have a mouth and vocal chords. We can stand and perform locomotive functions because we have our body.
We are able live in this world because we have a complete human structure.
Although we might not notice it, but the structure of our human body gives us life, apart from the external elements (such as air, food, water, and others) that we need to take everyday. Without a complete body structure, we cannot live normally in this world.
Structures are not just important and beneficial to the human body. In fact, the office building that you are occupying, the house where you and your family lives, the vehicle that you drive from your home to work, the shopping mall where you purchase your basic and other personal needs, and other things in the environment have a basic structure to complete not just their physical appearance but also their purpose as well.
Is there a house without doors and roofs? Is there a vehicle without engine and wheels?