Liturgy is the creation of Jesus Christ. He continues his redemptive creation in liturgi-cal activities, especially in celebration of the Eucharist. He does it in the Church and through the Church. Apostles and their followers were enable to act „in persona Christi”. In the Ancient History, until the 4th century, celebrants created liturgical texts. They were inspired by the Bible. From the 4th century they began to write down the prayers used in liturgy. In that way the fidelity to the Gospel of Jesus Christ was retained.