Q. 1. Why is Abraham called "Our father in faith?"

A. 1. In the Roman Catholic Church, Abraham is called "our father in Faith" in the Eucharistic prayer of the Roman Canon that is recited during the celebration of the Holy Mass.

The Biblical Patriarch Abraham is "our father in faith" because he was the first to believe in the promises God made to him and his descendants. The inheritance promised to the "descendants" in this phrase is not associated with being blood related, but rather of being spiritually united to the family of Abraham through faith in God, Abraham being the first.