They…

They couldn’t have built the pyramids

without the slaves;

… couldn’t have made the oceans

without the waves;

… couldn’t have made sweet, sweet music

without the staves;

… couldn’t have coped with reviews

without the raves;

… couldn’t have painted a full-length portrait

without the accompanying architecture,

portico, columns and architraves;

and they couldn’t have done that,

if they hadn’t at least attempted the feet.