"You can never understand one language until you understand at least two."
"A different language is a different vision of life."
"Americans who travel abroad for the first time are often shocked to discover that, despite all the progress that has been made in the last 30 years, many foreign people still speak in foreign languages."
"To have another language is to possess a second soul."
"Change your language and you change your thoughts."
"If you talk to a man in a language he understands, that goes to his head. If you talk to him in his language, that goes to his heart."