First of all, you always see the world according to your expectations, ideas that are stored in you about goals. If you recognize (because it is valuable to you) that it deviates from it, then the perception is adjusted accordingly - again according to your goals, because only through it can you perceive the world.
There is no world as it actually is, but only one from the perspective of the respective viewer.
Therefore, we do not see the world as it lies before us (that is, not the same for everyone), but one that the brain  shows us based on its goals.
Since everyone has their own characteristic goals, they also see their own world, to which they respond individually.
(By the way: since each genre has its specific goals, it also looks the world similar).
So people can only perceive the world from the perspective of the respective viewer.
And: Mind means to perceive a thing exactly that is to understand it. You can only grasp what you have a system for.
(If you encounter something for something completely new, you can of course also take it in, grasp it - but, as I said, only according to your abilities (your goals). This is how the new from the inner and inner field of the human being becomes the brains of his abilities adjusted accordingly.
Accordingly, you first take in the world through the goals in yourself and then with your selected senses - in this order. The brain constantly receives unfiltered stimuli (humans absorb approx. 11 million bits per second), but it does not simply represent the world in front of us 1: 1, but selects it with its midpoints, which the senses then Align in such a way that they only perceive the information that fits the goals of the brain.
These millions of bits are not there to map the environment exactly for us, but to compare the structures that arise after selection by our goals with those stored in the brain and, if necessary, to correct them by learning (changing synapses) ,
In general, it is the case that people have the world of their genes in mind, together with those that have been built on them through experiences and learning.
This is the reason why we perceive the world differently and possibly wrongly; because we weren't in the right midpoints. (Wrong in the relationship that we have disadvantages as a result, e.g. not reacting appropriately.)
And since the selection by the goals also influences the storage of experiences in the brain, this can lead to incorrect information.
Recognition also takes place through goals; you can recognize what has been stored in the brain. This is also the reason for confusion (because the brain goes by similarities).
The selected stimuli may change existing neuronal networks in the brain, or generate new ones if goals (midpoints) in the psyche  consider this to be important. If there are more or less strong differences in the stimuli to what has been saved so far, it is adjusted.
By means of the senses that send their information to the brain via attention, this is always up to date - if the goals of perception are not too narrowly constrained by certain (rigid) midpoints.
Without new information from the senses, the brain is virtually blind - and only acts according to the information that it
had previously stored - as it is in a dream.
Individual things are not important in terms of recognition. It all depends on the goal. If this is to look at details, only then will they be given special attention. But when it comes to saving the overall impression, you perceive it as a whole.
The sense of music can serve as an example: You perceive the whole, and not the individual instruments, because this is not the goal. (The whole thing is to perceive the feeling of music). The perception of individual devices would cloud the sensation, because it could lead to other midpoints and could be distracted.
This is exactly how you take everything in a holistic way from one goal in everyday life. And that's how you see the world.
If something is no longer correct (e.g. something dangerous appears), a target is activated in order to perceive it specifically. This suddenly puts you in a different midpoint. This is also taken in holistically and creates a different pattern in the brain.
How and with what a room is filled is not important at first, as long as you are in the goal of perceiving this room. It is only when you take a closer look at other goals that they gain value.
So only the respective wholeness is stored in the brain.
Conclusion: The brain always takes a holistic view. The goals that are stimulated, however, can quickly change the topics.
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