Isaac was born on January 5, 1929.[6] He established the Centro de Estudios Teológicos (Center for Theological Studies) in Santo Domingo in 1978.[7] In 1985, along with the Dominican Association for Rehabilitation, he led the diocese in a polio vaccination campaign for children from birth to five years old.[5] He was also the author of Consejería Pastoral Noutética, an anthology of articles in Spanish on spiritual counseling.[8]
^Arthur B. Williams, Jr., ed. (2004). Black bishops of the Episcopal Church, 1874-2004: biographical sketches. New York: Episcopal Church Office of Black Ministries. OCLC58481058.
^Luna, Katheryn (4 November 2017). "Cerimonia: Iglesia Episcopal Dominicana instala a su nuevo obispo Moisés Quezada Mota". Listin Diario. Santo Domingo. Quezada es el tercer dominicano en dirigir la Iglesia Episcopal en el país, sucediendo al obispo Holguín quien estuvo en el cargo desde el 1991 al 2017, y este a su vez a Telésforo Isaac de 1972 hasta el 1991, el primero en dirigir la comunidad episcopal.