“Youth Prepared to Meet Error—Young men who desire to enter the field as ministers, colporteurs, or canvassers should first receive a suitable degree of mental training, as well as a special preparation for their calling. Those who are uneducated, untrained, and unrefined are not prepared to enter a field in which the powerful influences of talent and education combat the truths of God's word. Neither can they successfully meet the strange forms of error, religious and philosophical combined, to expose which requires a knowledge of scientific as well as Scriptural truth.—Testimonies for the Church 5:390.” (PM 287.1).