'Jerusalem'

And did those feet in ancient time 
Walk upon England's mountains green? 
And was the holy Lamb of God 
On England's pleasant pastures seen? 

And did the Countenance Devine 
Shine forth upon our clouded hills? 
And was Jerusalem builded here 
Among these dark Satanic mills? 

Bring me my Bow of burning gold: 
Bring me my Arrows of Desire: 
Bring me my Spear: O clouds unfold! 
Bring me my Chariot of fire. 

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. 

William Blake 
From Milton, Preface