The used rhetorical device is Hyperbole.
Saying that something is a billion times better is hyperbole because it is not really that much better, you would just be over exaggerating.
in this excerpt the candle symbolizes Ivan Illyich's approaching death.
Ivan
is thinking about his death and what will happen to him afterwards.
This is reflected in the candle falling to the floor. Because once there
was light from the candle, and since it falls that light is no more.
The burning out of the candle symbolizes death
In Psalm 8, the imagery that describes the "heavens, the work of thy fingers, the moon and the stars" presents the Lord b) as glorious and creative.