Illusions

Illusion – a perception that is not true to reality, having been altered subjectively in some way in the mind of the perceiver. There is also the closed disk of our psychic. We have certain beliefs about this world that are conditioned by our perception of this world. And the perception of this world is conditioned about beliefs we have. And the beliefs we have are conditioned by the illusions and delusions we have.
As you can see it is impossible to detect the source of "all evil". It is impossible to realize which one was the basis for other to become false and deviated from the reality. Though, one way or another there are illusion and those illusions are common for every one of us. There is a common expression "see everything through rose-colored glasses" and this is the expression that deals with illusion.
The delusion is rather painful process but it is a process that helps us to start recognizes this world as it is. It is common for people to have certain illusion about this life and people that surround them. Illusions are something we have as a result of our unwilling to realize the real state of things. Say, we see something or someone and we realize deep in our subconsciousness that it is a bad thing or a bad person. Though, we have no strength to confess it as in that case we will be obliged to reject that person or thing.
But it is necessary to be able to realize the illusion we have and be strong enough to delusion those. In other case our entire life will be just a row of illusions that have nothing to do with the real world. And there for sure will be a day when all of the illusions will be disillusioned by other people. And the disillusion will be the most painful event of the life.