The English word "sacrament" is derived indirectly from the EcclesiasticalLatin sacrāmentum, from Latin sacrō ("hallow, consecrate"), from sacer ("sacred, holy"). In Ancient Rome, the term meant a soldier's oath of allegiance, and also a sacred rite. Tertullian, a third-century Christian writer, suggested that, just as the soldier's oath was a sign of the beginning of a new life, so too was initiation into the Christian community through Baptism and Eucharist







 (ref. Roo, William A. van (1992). The Christian Sacrament. Roma: Ed. Pontificia Univ. Gregoriana. p. 37. ISBN 8876526528)