the use of borrowed images
 
Images come upon elsewhere acquire a new resonance in Eliot's context --

"Frisch weht der Wind  
 Der Heimat zu.  
 Mein Irisch Kind,  
 Wo weilest du?"

"Od' und leer das Meer"
 
-- or lend a reaffirming note -- to Eliot's notion of "death by water", for instance, as in this image from Shakespeare:
 
"Those are pearls that were his eyes"
 
-- and sometimes, as here, a host of allied images chime in -- 
 
"Full fathom five thy father lies;       
 Of his bones are coral made;           
 Those are pearls that were his eyes:  
 Nothing of him that doth fade
 But doth suffer a sea-change
 Into something rich and strange.       
 Sea-nymphs hourly sing his knell."  
 
Cheers, 
 CR