Willful ignorance ... how do we avoid it?

Humility. Not false humility. True humility which is less common. Humility is a measuring stick we use on ourselves first before we use it on others. It doesn't measure percentages. Whether you are 40 percent or 60 percent, you are still wrong.

Take care of the the 40 percent before you go after someone else's 60. Willful ignorance may win a battle or two, but it will not win the war. True Humility, on the other hand ... is hard to fight against. People will go through the motions, but their own hearts will convict them.