Between Knowledge And Belief

In Tractatus Logico-Philosophicus Wittgenstein put forward his "boundary theory",that is the difference between what can be said and what can't be said.His "boundary theory" is not only related to the linguistic turn of the history of westen philosophy,but also to Wittgenstein's life.On the one hand,according to his "boundary theory",Wittgenstein put what can be said into the category of knowledge and put what can't be said into the realm of belief through the logic analyses of language,and also Wittgenstein focused on belief in his whole philosophy.On the other hand, traced to its source, Wittgenstein's "boundary theory" has a close affinity to the critical philosophy of Kant (the division of knowledge metaphysics and moral metaphysics),and at the same time, Wittgenstein's "boundary theory" is also an inheritance and development of Kant's philosophy.