Passage by E. B. White

Here is a notable passage from Charlotte's Web by E. B. White. While I strive to understand all I can, I also value the sentiment of Dr. Dorian.

Dr. Dorian: Well, who taught the spider? A young spider knows how to spin a web without any instructions from anybody. Don't you regard that as a miracle? Mrs. Arable: I suppose so. I never looked at it that way before. Still, I don't understand how those words got into the web. I don't understand it, and I don't like what I can't understand. Dr. Dorian: None of us do. I'm a doctor. Doctors are supposed to understand everything. But I don't understand everything, and I don't intend to let it worry me.