“[R]epetition is as an essential element of language learning as a knife is to a lathe or fuel is to an internal combustion engine.”

“One should connect language learning with either work or leisure. And not at the expense of them but to supplement them.”

“[T]he time spent on language learning is lost unless it reaches a certain—daily and weekly—concentration.”

“[B]ooks, which can be consulted at any time, questioned again and again, and read into scraps, cannot be rivaled as a language-learning tool.”

“[S]elf-assurance, motivation, and a good method play a much more important role in language learning than the vague concept of innate ability, and that dealing with languages is not only an effective and joyful means of developing human relationships, but also of preserving one's mental capacity and spiritual balance.”

“He who knows other languages feels even closer to his own language.”

“Language is the only thing worth knowing even poorly.”