According to Collier and Strain, the Roman Catholic Church has been helping migrants for decades. The Christian faith receives a sense of justice for migrants from Abrahamic faith traditions. Catholics follow these guidelines to help immigrants: "for all persons on the move". The reasons to help those on the move were established in 1952 when leaders of the Roman Catholic Church published written material that reinforced the teachings of the church. One of the quotes from the Bible used to justify hospitality is "when an alien resides with you in your land, you shall not oppress the alien. The alien who resides with you shall be to you as a citizen among you; you shall love the alien as yourself, for you were aliens in the land of Egypt: I am the Lord your God" (Leviticus 19:33).