When one does not practice insight meditation ones world view is subjective and not in line with reality. One has no reference point so to say.
When one is practicing insight meditation one sees for oneself how reality functions and delusion is done away with, e.g. the illusion of permanence and an enduring Self-entity.
An enduring Self-entity can also be called a Self, Me, Soul etc. There is no such thing which is verifiable through the practice of insight meditation. What is believed to be a Self is merely a mental formation.
When practicing insight meditation one will see how conditioned phenomena are not stand alone units. They have causes and conditions and they themselves become causes for the arising of other phenomena. The relational factor and interdependency of conditioned phenomena becomes visible to the insight meditator.