How does Isaac Asimov use imagery in Forward the Foundation?

Imagery:

"It has been said that Hari Seldon left this life as he lived it, for he died with the future he created unfolding all around him."

"And there, with an appalled group watching in stupor - there, on the semicircular stairway - was the body of His Imperial Majesty, Cleon I, smashed all but beyond recognition. His rich Imperial robes now served as a shroud. Cowering against the wall, staring stupidly at the horrified faces surrounding him, was Mandell Gruber.