Ever seen these words before?
I will not cease from mental fight,
Nor shall my sword sleep in my hand
Till we have built Jerusalem
In England's green and pleasant land.
There are three pieces of music that most remind me of the Britain I once knew: 'Jerusalem', the hymn you quoted from, 'Cwm Rhonda' ('Bread of Heaven'), and the Pomp and Circumstance March which is based on 'Land of Hope and Glory' and used widely here for Graduation ceremonies.