"And the man who profits by another's ignorance can not lie down at peace with his God."

Anyone tall enough to walk had an opinion, almost always informed by ignorance.

Who knows what they could set off by accident or ignorance?

It is not right to let a purpose go by default and ignorance.

I was still discomfited by my ignorance of the genre.

He knew she was a good person, but she irritated him by her ignorance.

I should not like to cause him any unnecessary annoyance or distress by ignorance.

I do not doubt we killed him by ignorance.

"I see people starved, tortured by disease and ignorance," he said.

"I can grow the flowers, but not read them," and David looked rather depressed by his own ignorance of those delicate matters.