
Joining the seminary faculty within a year of his ordination, he taught philosophy, physics and chemistry . In his position there, he taught many illustrious Cubans, including José Antonio Saco, Domingo del Monte, and José de la Luz y Caballero. Referring to Venerable Varela, De la Luz said: "As long as there is thought in Cuba , we will have to remember him, the one who taught us how to think".

In New York he published many articles about human rights, as well as multiple essays on religious tolerance, cooperation between the English and Spanish-speaking communities, and the importance of education.
In 1837, Venerable Felix was named Vicar General of the Diocese of New York, which then covered all of New York State and the northern half of New Jersey. In this post, he played a major role in the way the American Church dealt with the tremendous influx of Irish refugees, which was just beginning at the time. His desire to assist those in need coupled with his gift for languages allowed him to master the Irish language in order to communicate more efficiently with many of the recent Irish arrivals.

In 1848, worn out by his labors, Venerable Felix developed severe asthma, which led him to retire to St. Augustine , dying there five years later. Nearly sixty years after his death, his body was dis-interred from Tolomato Cemetery and returned to Cuba to be laid to rest in the University of Havana 's Aula Magna.
In 1997 the United States Postal Service honored him by issuing a 32-cent commemorative stamp. Because of his experiences, many in the Cuban American exile community identify with him.
![]() |
![]() |