Lines: 'That time is dead for ever
Heraclitus's river
The stream with 'unreturning waves' echoes Heraclitus: you can't step in the same river twice. Time flows one direction only.
Aghast/ghast wordplay
Shelley rhymes 'aghast' (horrified) with 'ghast' (archaic for 'ghost-like'). The spectres are both terrifying and ghostly—dead hopes made visible.
Heraclitus's river
The stream with 'unreturning waves' echoes Heraclitus: you can't step in the same river twice. Time flows one direction only.
We become monuments
The survivors don't just remember—they ARE tombs. Living people turned into memorial markers for dead possibilities.