The theme song was composed by Enrique Vázquez Castro, a Spanish priest and renowned liturgical music composer. Vázquez Castro studied piano and composition at the "Jesús Guridi" Conservatory of Music in his hometown, where he earned his degree in Composition and Instrumentation in 2000. He was awarded second place at the 8th Francesc Civil Composition Competition for his composition "Ahots urdiña" (1995), and first place at the Cristóbal Halfter XVIII Composition Contest (1996) for his original piece "Itsaropen izarra." He also served as musical director for the National Church of Santiago and Montserrat in Rome while pursuing advanced studies in theology at the Pontifical Gregorian University.
The lyrics were written by Monsignor César Franco, auxiliary bishop of Madrid. The stanzas of the hymn emphasize the closeness of youth to the holy humanity of Christ in the typical style of Spanish mystical traditions.
The theme song consists of seven verses and a chorus based on the WYD theme, "Planted and built up in Jesus Christ, firm in the faith", which was taken from the letter of St. Paul to the Colossians. The chorus reads:
Firm in the faith, we walk in Christ,
Our friend, our God.
All glory to Him, all glory to Him!
We walk in Christ, firm in the faith.
Now that the theme song has been approved, it will be translated into the official languages of WYD and recorded in three versions: one liturgical, one instrumental for large choirs, and one pop version with guitar accompaniment.
The theme song will make its debut on the feast of the Virgin of the Almudena on November 9, 2010 at the cathedral in Madrid. It will also be distributed worldwide on the Internet, both as an audio track and a music video.
