
“You cannot teach a man anything, you can only help him to find it within himself.”
As quoted in How to Win Friends and Influence People (1935) by Dale Carnegie, p. 117; also paraphrased as "You cannot teach a man anything, you can only help him to find it for himself." Attributions are found as early as 1882.
Attributed
Source: Google Books link https://books.google.com/books?id=h70_AQAAMAAJ&pg=PA476&dq=You+cannot+teach+a+man+anything;+you+can+only+help+him+find+it+within+himself&hl=en&sa=X&ved=0CB0Q6AEwAGoVChMI39Gmss_gyAIVRNRjCh1Q2wGN#v=onepage&q=%22You%20cannot%20teach%22&f=false