In the preamble of the Constitution, the principle which is best expressed is that we are a country run by the people. We are not ruled by a monarch, an aristocracy, and a select few people. The American citizens have the ability to govern themselves and elect representatives that best reflect their views.
When people countinue to lie, in the times they actually tell the truth, intead of lying, no one is going to believe them. As an exaple; the boy who cried wolf.