“Es cierto que la libertad es algo precioso, tan precioso que debe ser racionada cuidadosamente.”
Original
It is true that liberty is precious — so precious that it must be rationed.
As quoted in Soviet Communism: A New Civilization? (1936) by Sidney & Beatrice Webb
Attributions
Looking up the reference, the book that is cited is not even quoting him. The quote's origins are the book Soviet Communism: A New Civilisation by Sidney and Beatrice Webb. However, the books states that "...Lenin is said to have once observed that..." so clearly the authors are not quoting directly. The quote really just sounds like the kind of thing an anti-communist dreams.
Citas similares
“Uno de los objetivos de la educación debería ser enseñar lo preciosa que es la vida.”

La Esclavitud de la Voluntad: Una condensacion moderna