Spencer W. Kimball
Preparing one's mind and the spirit to know the truth. To arrive at mission age and be illiterate in the gospel or the common knowledge of the world would be most unfortunate indeed. Certainly by the time young people reach the age when they are eligible to be called, they should be prepared to step from conventional roles at home into the important role of the missionary without a total reorganization of their life, standards, or training.

– Spencer W. Kimball