Human brain is built to continually discard/ignore the elements once they have been observed and classified. For the child a chair in the room is a fantastic phenomenon, unknown and wonderful. Once you learn to recognize chairs they will be instantly labeled as "a known object used to sit down on" and discarded from the active consciousness.
It's a necessary adaptation, brain takes lot of energy so you need to constantly minimize the processing load down to the bare minimum and discard all the rest. Otherwise you spend too much energy and starve to death. We are not built to admire the beauty around us, we're biological machines optimized for survival. The realities of the human condition...
It is possible to see the world around you as something completely new and awe inspiring but it take's a conscious effort, essentially a brain hack of sorts. That's what Japanese are doing when they meditate on the form and texture of a single pine needle.
( loosely related: https://www.youtube.com/watch?v=ogvMnx-2nFg )