Everyone always wants the "truth", which is assuming that there is only one. But the truth is so manipulable, that there can be several truths at one time.
For example, on a rainy day you feel gloomy, and on a sunny day you feel happy. This is a truth, not the truth. All the children are being
brainwashed by children television shows that Sun = good, rain = bad, ie Teletubbies, Barney, etc. That is how we were taught to think, this is how we think.
However, it doesn't always have to be this way. For some people, rain is happy, rain is great, and sun is bad. The desert ecosystem, for example, looks devoid of life because the animals are hiding from the heat, and trying to keep cool. Once the rains come in, they come out, cactus flowers bloom, and the "devoid" desert is now bustling full of life.
The Truth is so easily changed, and thus humans are just as easily swayed. Humans are controlled by thier perspective of the truth, because that is human.
Just my two cents