“[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.”

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

“[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.”

“[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.”

“Solely in the world of languages is the amateur of value. Well-intentioned sentences full of mistakes can still build bridges between people.”

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