Answer:
Irony means the use of the opposite to show humorous or clear difference.
Step-by-step explanation:
The irony in the given sentence is the use of the opposite of evil and good. So the author says that the person wants to show his decency or excellence when he is plunged in the depths of evil . According to the author the person wants or desires for those things which he doesn't even understand or which are totally opposite to his nature. He is charmed by the fascination of the world totally different to his own adaptive world.