The idea of the One Vehicle can be applied to the secular world as well. The diversification of world culture has created differences in ideas, or in the ways of thinking, among nations. Human culture has developed as a result of our search for the ultimate truth. In the process of cultural advancement through the pursuit of ultimate truth, conflicts often emerge due to our many theoretical differences. History tells us that these confrontations sometimes lead to bitter disputes or even war. Despite all differences in the process, however, these theories or ideas must eventually be unified, because they are all leading to the one single goal of the ultimate truth. The Lotus Sutra clarifies this concept through the teaching of the One Vehicle.