The Second Coming
by W. B. Yeats
 
Turning and turning in the widening gyre  
The falcon cannot hear the falconer;  
Things fall apart; the centre cannot hold;  
Mere anarchy is loosed upon the world,  
The blood-dimmed tide is loosed, and everywhere 5
The ceremony of innocence is drowned;  
The best lack all conviction, while the worst  
Are full of passionate intensity.  
   
Surely some revelation is at hand;  
Surely the Second Coming is at hand. 10
The Second Coming! Hardly are those words out  
When a vast image out of Spiritus Mundi  
A shape with lion body and the head of a man,  
A gaze blank and pitiless as the sun,  
Is moving its slow thighs, while all about it 15
Reel shadows of the indignant desert birds.  
The darkness drops again; but now I know  
That twenty centuries of stony sleep  
Were vexed to nightmare by a rocking cradle,  
And what rough beast, its hour come round at last, 20
Slouches towards Bethlehem to be born?  
   

 
gyre — a three-dimensional spiral. Yeats thought of history as consisting of gyres, meaning that it progressed in a circular movement as time advanced.
 
Second Coming — in the Christian mythos, the return of Jesus to establish the Kingdom of Heaven on earth.
 
Spiritus Mundi literally Spirit World in Latin. For Yeats, it refers to a kind of collective unconscious trove of symbolism to which certain poets and mystics have access.
 
Bethlehem the birthplace of Jesus according to most Christian traditions