Deaf or Unhearing
Here’s an Australian proverb, courtesy of @Care2JoinMe:
None so deaf as those who would not hear.
The lesson here is simple: if you don’t want to hear something, you won’t. The same goes for seeing.
What you’re probably not hearing or seeing is the dragon in your backyard. The evils and injustices around you, which may be plain to those who choose to see, are invisible to the willfully blind, and unheard by the willfully deaf.
Pay attention to the world around you, and you will see what others miss. The world may appear to be a darker place, but you will be able to make it a better one.