30 points
I have a quote that fits this situation well:
When you‘re dead, you do not know you are dead. Its only painful and difficult for others. The same applies when you are stupid.
7 points
It’s not about inability to understand, mind, it’s about unwillingness to understand.
There are plenty of people who have mental deficiencies who are well aware of that, and how much trouble they have understanding the world around them. But they at least try.
The same can not be said for those who are perfectly capable of understanding, yet simply choose not to.