Mater si, magistra no
Mater si, magistra no (English: "Mother yes, teacher no") is a macaronic phrase suggesting that Catholics need not follow all the teachings of the Catholic Church, particularly in regard to economic justice or the rights of workers. It was originally formulated in direct response to Pope John XXIII's encyclical letter Mater et Magistra in 1961, as a reference to the anti-Castro slogan, "Cuba sí, Castro no".