There are four points to note about this brief explanation.

You are then free to bin all incoming appeals, and deal with calls by offering a brief explanation.

The leader might use closed, observation questions to clarify the meaning, but normally it's helpful to give a brief explanation of the passage.

After a brief explanation, he was directed to the workroom in the basement.

I plan to remove the passage from the main text of my book to the notes in any future edition, with a brief explanation.