From a practical standpoint, I taught, in Spanish, university-level courses for 23 consecutive years in the School of Advanced Biblical Studies of Churches of Christ in Puerto Rico, developing a substantial part of the courses. Two, Four, and Six Year Certificates were awarded to qualifying students, almost all of whom had at least a Bachelor's Degree in one or another field of study. Postgraduate studies, which I also taught for years, were offered to students who wanted to continue their studies beyond six years. In addition, I had the privilege of teaching in several less formal schools of ministerial preparation conducted for a few months at a time, had a weekly radio program for 30-plus years, taught thousands of classes in homes, public venues, and congregations, preached thousands of sermons in congregations and campaigns, presented scores of leadership conferences, and answered thousands of letters and e-mails requesting additional clarifications or challenging what was being taught. In seven countries and ten states of the USA. Mostly in Puerto Rico and the Dominican Republic. Receiving 55,000 plus letters, cards, and telephone communications, plus tens of thousands of e-mails. Keeping meticulous records and recording almost 15,000 conversions and the establishment of 249 congregations throughout the Spanish-speaking world, all reported as brought about at least in part by the resources provided. Never ceasing to thank and praise God the Father and Jesus Christ the Son, giving them all the glory for the honor of thus serving them and their magnificent Cause. In these later years of my life, I am fully devoted to teaching on the Internet and printing tracts and other materials on a limited basis.