This paper focuses on an analysis of Beckett's views of language during different phases of his writing career, and reveals the philosophical origin to changes in his life. In addition, by a close reading of Mauthner's "Beiträge zu einer Kritik der Sprache", which had a pivotal effect on the post-Tractarian Wittgenstein, it probes into the root of "linguistic aporia" in Beckett's trilogy.