In the liturgy, the Amen is the act of consent of the people to the Work of God, as the ministers exercise it; it is also his act of adherence to the prayers made in his name by the celebrant. This sacred work is written by Pierre Tossou, choirmaster in Toulouse. He conducts the vocal ensemble of Rangueil in the same city. The organ part can be played on the piano and is not difficult. The vocal parts can be sung by any level singers.