Growing up and realizing "truth" is mostly PR

As a child we are taught to accept what we are told by authority figures as the truth.

Only later do we realize that the vast majority of what we are told is true is actually a public relations (PR) exercise to suit vested interests, and that the real truth is often very hard to find, covered over by lies, as it is if it represents a danger to the empires that have been built around the lies they spread.