Wittgenstein is considered by many the most profound philosopher in the 20th century. Which is ironic, because Wittgenstein thought most of what is called philosophy is pure garbage and originates from our misunderstanding of how language works. He thought if we understood language properly, the problems of philosophy would 'dissolve', instead of being resolved.
Wittgenstein was a classic mysterious philosopher character. Born in a very wealthy family in Austria, he lost his appetite for wealth after fighting in the first world war, and gave away his fortunes to his siblings. He led an ascetic life since. The only degree he had in life was a PhD. He was home schooled in his childhood, and didn't finish any of the colleges he enrolled into. He finally got his PhD from Cambridge for his manuscript of 'Tractatus Logico-Philosophicus'. In his entire life, he has had various professions ranging from schoolteacher, gardener, architect, and finally a college professor. He read very little of ancient philosophy, as he considered them mostly vacuous. And he despised academic philosophy and dissuaded his students to come in the academic career.
He published only one book in his lifetime, and one other book was published posthumously in his name. Funny thing is, in his later life he changed the core tenets of his early philosophy. You don't see it in philosophers many often. In his early life, he wrote with mathematical rigor, terse and precise, and had little time for lyrical beauty. In his later life, however, his writings were more diffuse, unsystematic and obscure.
Wittgenstein basically said that the structure and logic of language restricts the meaningful questions we can ask in philosophy. Most of the philosophical questions will seem nonsense if we rigorously scrutinize them under the microscope of linguistic logic. As most questions are nonsense, the answers to these questions will also be nonsense. We cannot meaningfully talk a about them.
Thence he pronounced his famous quotation: 'Whereof one cannot speak, thereof one must remain silent'. This does not mean, however, that those questions are not important. Indeed, Wittgenstein argued, the questions about which we cannot talk about are the most profound questions. In this regard, I think he echoes Eastern sages like Buddha or Lao Tzu, who proclaimed that thoughts and languages are inherently limited in capacity and the ultimate can't be expressed in language.
Unfortunately, this book was hardly readable for the most part. Lengthy convoluted sentences are abound through the book with little lucidity. I'm only not ratting it one star to pay some homage to Wittgenstein.