Many are free-to-use (ie public domain or copyright-free) meaning the words can be copied and sung to at least one tune with no concerns about copyright or performance licensing - sometimes in a limited setting.
Many of these hymns are old / traditional - but where possible a variety of styles and genres are included.
Psalm 50 - Have mercy on us O Lord, for we have sinned /Have mercy on me, God, in your kindness / My offences truly I know them / A pure heart create for me O God / Give me again the joy of your help.
Second: I Romans - Sn existed in the world long before the Law was given ... divine grace coming through the one man, Jesus Christ, cane to many as an abundant free gift..
Gospel: Matthew - Jesus fasted for forty days and nights in the desert, where he was tempted by the devil.
Themes:Christ the new Adam and source of salvation for the world
Hymns:Adam our Father and our Head
All Hail the Power of Jesus Name
All Mankind Fell in Adam's Fall
Christ is Made the Sure Foundation
Dear Lord and Father of Mankind
Forty Days and Forty Nights
Hear our Entreaties Lord
Lead us Heavenly Father Lead Us
Lift High the Cross
Lord Jesus Think on Me
Lord Who Throughout These Forty Days
O Jesus I have Promised
Praise to the Holiest in the Heights (esp 2nd verse)
Psalm 50 - Music for Mass setting
Suggestions about hymns that could be included are welcome: leave a comment below.