Latin 

"There can be no doubt as to the formative and educational value either of the language of the Romans or of great literature generally. It is a most eff ective training for the pliant minds of youth. It exercises, matures, and perfects the principal faculties of mind and spirit. It sharpens the wits and gives keenness of judgment. It helps the young mind to grasp things accurately and develop a true sense of values. It is also a means for teaching highly intelligent thought and speech."

-Pope John XXIII on the educational value of studying Latin