There is a contradiction in the question itself. Because the process of perception is the process of projecting the external world onto the internal one. When perceiving, a person cuts off those parts of the world that are not able to understand, and leaves a small part that is actual for himself, but objectively illusory. We only see what we are ready to see. The only way to bring your understanding of the world closer to reality is to train your senses and try to be impartial more often, try not to evaluate the world in terms of your own desires and aversions. The world is bigger and more complex than all the words and thoughts that can fit in your head. Every time when consciousness fixes a phenomenon as absolutely exact, it is necessary to shift the position of thinking in order to understand this phenomenon deeper. You cannot fixate on the fact that 2 + 2 = 4, you need to shift thinking to another system, in the ternary system 2 + 2 = 11, and so on. There will always be a depth of space for knowledge.
I do not know. But it seems to me that there is nothing difficult in this. For a start, it is enough to know average exact sciences. It is necessary to understand and recognize that all of humanity is just an accident. And people are nothing more than biological machines, all their actions, emotions, feelings are conditioned by something (and my answer is due to raising self-esteem). And you are me, just grown up in different conditions and with different initial data, and nothing would change if we changed consciousness, because the brain would remain in its place, but consciousness is something amorphous. The bottom line is that people, including me and you, this is their brain, and not what others and they think of themselves and not their body. Now to yourself, for a start it would not hurt to understand yourself very well , you also need to understand your desires, feelings, emotions and get away from self-deception. How to understand if you are engaged in self-deception? It is enough to ask yourself questions like: "why am I doing this?", "Why did I say that?", "Why think about it?" etc. and if you cannot answer at least one question in detail, most likely you are deceiving yourself. You also need to understand that there is no universal reason, magic, cosmic force, etc. Miracles do not happen, only what can happen happens. This is about illusions.
Bias disappears when there is absolutely no benefit to you in the question (physical, emotional, psychological, but no benefit does not mean lack of interest). My friend believes in God, because This makes her emotionally easier (it is beneficial, her relatives do not rot in the ground, but live in paradise), but why then I don’t believe, because it would be easier for me too, but no, it would not be, because I know that this is a lie , therefore, there is no benefit for me in this, and after death there will be no paradise, but necrobiosis. Doubting your judgments, and stopping trying to prove anything to anyone, you will get rid of your own interpretations and instead of your own interpretations you say to others and to myself "I don't know that." And no longer consciously, you begin to assume, not assert.
And when you look at the world without illusions, your own interpretation and prejudice, you will understand how limited a person is, and how unlimited the world around him is!
Using scientific methodology. You develop scientific thinking in yourself and become a researcher of objects and phenomena of interest to you. Seeing the world as it really is is a lot of work.
The truth about the world, about a person, his condition, about his origin and his future, about the future of the world, about what is good and what is bad, about salvation and destruction, about righteousness and lawlessness, about light and darkness and the rest and the rest and the rest were brought by the Son of God Christ. Explore His Revelation and Teachings and you will see the ins and outs of everything.
Well, do you understand that the answers will include illusions and the perception of the respondents? Better your own interpretation, since there is one. In my, for example, understanding, it would be unbiased not to take "at your own expense" anything from happening around. Whether the "world" loves you, hates you, helps or "puts a spoke in the wheels" - all this is not for you, these are personal cockroaches of the components of the world. Just like you, for example, you transfer old women across the road, not because you have some kind of personal sympathy for grannies - you just, for example, were brought up like that. And the fact that you were brought up just like that, there were no calculations either - "it happened by itself", that's the kind of environment it was, then. I was already carried away somewhere in the wrong steppe. In general, just understand that everyone has their own motives for certain actions.