The goal of politics should not be the pursuit of an ideal, but rather the search for common ground and reasonable consensus.
(1)政治应该有理想。For example, without Martin Luther King's great idealism and onerous conflict, the American black perhaps would still have to sit at the back on the bus; without Mohandas Gandhi’s great political idealism to achieve social and political independence, India might still be one colony of Great Britain.
(2)但是光有理想有时可能会遇到困难。Consider the case of the failure of the Utopian Owen. He believed the status of a perfect world where there were no wars and fights; every one was born equal, and no information need to be hided. Owen once tried to establish such an ideal society; however he failed to take into account of certain practical conditions and existing difficulties during its construction. As a result, his plan did not obtain the general support and finally faced up with his predetermined failure.
(3)因此，有理想的同时还要寻求共同点和合理的一致，这样才能赢得支持和认同。Chairman Deng, for instance, rather than sticking to the idealism of communism, enacted the marvelous and far-reaching policies of "one country, two systems", which earned not only national support but also international acknowledgement.