He was born at Lauingen on the Danube, in Germany, and studied at Padua and Paris before entering the Dominican Order. He taught in a number of places including the University of Paris, where St Thomas Aquinas studied under him.

St Andrew of Crete is of great importance in the Orthodox Church because he invented – or at least introduced into the liturgy – the canon, a new form of hymnody of which there is no sign before his time. Canons are huge, elaborately structured musical and poetic compositions. Andrew’s immense “Greek Canon”, for instance, is a hymn 250 verses long interspersed with litanies and odes, takes three hours to chant, and goes chronologically through the entire Old and New Testaments, showing examples of the need for repentance and conversion.

The theological virtue of hope is symbolized by the colour green, just as the burning fire of love is symbolized by red. Green is the colour of growing things, and hope, like them, is always new and always fresh. Liturgically, green is the colour of Ordinary Time, the orderly sequence of weeks through the year, a season in which we are being neither single-mindedly penitent (in purple) nor overwhelmingly joyful (in white).