„Lo importante es no dejar de hacerse preguntas.“
The important thing is not to stop questioning.
Old Man's Advice to Youth: "Never Lose a Holy Curiosity," http://books.google.com/books?id=dlYEAAAAMBAJ&lpg=PP1&dq=Life%2C%202%20May%201955&pg=PA61#v=onepage&q=Life,%202%20May%201955&f=false LIFE magazine (2 May 1955) statement to William Miller, p. 64.
Contexto: The important thing is not to stop questioning. Curiosity has its own reason for existence. One cannot help but be in awe when he contemplates the mysteries of eternity, of life, of the marvelous structure of reality. It is enough if one tries merely to comprehend a little of this mystery each day. Never lose a holy curiosity. … Don't stop to marvel.