diff --git a/content/quotes/groucho-marx/index.md b/content/quotes/groucho-marx/index.md
index c2474aa..ddea8f1 100644
--- a/content/quotes/groucho-marx/index.md
+++ b/content/quotes/groucho-marx/index.md
@@ -8,3 +8,6 @@ tags = ["quotes", "groucho marx", "luck", "superstition"]
 
 > "A black cat crossing your path signifies that the animal is going somewhere."
 
+> "Outside of a dog, a book is a man's best friend. Inside a dog it's too
+> dark to read."
+