Nature does not intend to be beautiful. It is focused on survival by accurate problem solving. It has the ability to create both complexity and simplicity into a perfect adaptation between organisms and habitat.
The built world is a manmade inclusion in a global natural ecosystem. During the design process, symbiotic and specifically mutualistic relationships between the built world and the natural global ecosystem should be formed. There are many clues available in the sciences — chemistry, physics, biology.
A good building should be in harmony with its habitat similar to a whale in the ocean, an albatross on a long flight, or a cheetah on the Savannah. Although the purpose of adaptation is survival and not creating beauty, strangely this is the ineluctable result.
To be self-sustainable and self-sufficient is an interesting challenge, and the change of perceptions is the key. Working with materials to their optimum ability is part of this objective — to enclose space with the least amount of material, by understanding structure and the full process of design, manufacture, and assembly.
So what is a building? It is a contained space created by humans — a space to protect, store, and support human activity. In its most reduced form it is a constructed microclimate: a space where the climate inside is more comfortable than outside. In a harsh climate the absence of a shelter may mean death.
The act of architecture should not be reduced to only art or a stylistic packaging exercise.
"Buildings, too, are children of earth and sun."
— Frank Lloyd Wright