Christianity is the world's largest religion based on the life and teachings of Jesus Christ. Core Christian teachings include that Jesus was crucified to save humanity from sins and offer eternal life. The Bible is the primary sacred text of Christianity and is divided into the Old and New Testaments. Major Christian holidays include Christmas, Lent, and Easter which commemorate events in the life of Jesus. Christians worship God as a Trinity of three persons - God the Father, God the Son (Jesus), and God the Holy Spirit. Major branches of Christianity include Catholicism, Protestantism, and Eastern Orthodoxy.