Juxtaposition
A tales of two cities by Charles Dickens
It was the best of times, it was the worst of times, it was the age of wisdom, it was the age of foolishness, it was the epoch of belief, it was the epoch of incredulity, it was the season of Light, it was the season of Darkness
Dickens is talking about the struggles of life and acceptance of death.
Juxtaposition is pretty much just two opposite things. Examples:
Belief and denial
Good and bad
Hot and cold
Young and old