In some specific period，for political reasons，thinker and intellectuals as a whole undergo ruthless treatment，such as the Culture Revolution from 1966 to 1976 in China. During those ten years，many great thinkers and intellectuals are forbidden to think and express their thoughts freely. Some of them even encountered physical torture. A crueler example is Qin Dynasty in China 2000 years ago. Yingzheng，the first emperor of China，sentenced the thinkers who held different political or social ideas from him to death. Moreover，he buried their writings.
It is the greatest thinkers' tragedy not to be understood or even be persecuted. It is also the fact that human beings are always shortsighted， sometimes even foolish. Nevertheless，what is truth will never change itself or disappear along with the elapsing of time however strong the falsehood seems to be. Hence，though almost all the greatest thinkers are hermits，some of them may be even the prisoners in their societies; they would gain their perpetual lives through their glaring
