Books are as useful to a stupid person as a mirror is useful to a blind person.

Explanation

This Chanakya teaching metaphorically compares books to mirrors and emphasizes their usefulness or lack thereof in specific situations. It suggests that books are only beneficial to those who possess the intelligence and capacity to comprehend and gain knowledge from them. Just as a mirror serves no purpose to a blind person who cannot see their reflection, books are of little value to someone who lacks the ability or willingness to understand and apply the information within them. It underscores the importance of having the right mindset and receptivity to make effective use of educational resources.