“Every now and then they quote Talleyrand’s aphorism: language is needed to hide the thoughts of diplomats (and generally cunning and dubious individuals). But just the opposite is true. Let someone deliberately try to hide - only from others or himself - what he unconsciously carries within himself - the tongue will give everything away. This, among other things, is the meaning of the maxim: le style c’est l’homme; a person's statements may be false, but his essence is revealed in an undisguised form in the style of his speech. I have terrible experiences associated with this peculiar (in the philological sense) language of the Third Reich...” These are the words of Victor Klemperer (1881–1960), a famous German philologist, specialist in French literature. In recent years, the name Klemperer has been heard in Germany more and more often - two have been published volumes of his memoirs and five volumes of diaries. After the Nazis came to power, he was threatened with death as a Jew. He survived physically thanks to his “Aryan” wife, and survived spiritually thanks to “LTI,” a philologist’s notebook. These notes combine lively form, astonishing facts, and most importantly, insightful observations of the everyday and official language of Nazi Germany, the main tool for manipulating mass consciousness. This is not only an exciting document, a living testimony to human destiny, but also a unique monument to an era whose problems are still relevant, causing thought and debate.