Encouraged by Br. Francis Cody and inspired by Br. Andrew Gonzalez, his former high school teacher in Bacolod, Dizon entered the La Salle Brothers' Postulancy right after high school. He made his first vows on October 11, 1962 and began his undergraduate studies at De La Salle College in Manila. After two years of studying, he was sent by the De La Salle Brothers to The Catholic University of America in 1965 where he finished his Bachelor of Arts, Major in Mathematics in 1968.