"a man convinced against his will is of the same opinion still"
   [1]http://izquotes.com/quote/360754 appears to be a Samuel
   Butler variation.

   Is it true?
   Good question. I willfully learn and enjoy cognitive dissonance
   that I can handle. Yet in many ways, I'm not so different than I
   was when I was eight years old.

   Did something really change? Assenting to a different choice of
   words while retaining the same framework to me is playing with
   more or less synonymous things or at least replaceable concepts
   structured in the same framework.

   So, I don't know yet.

References

   Visible links
   1. http://izquotes.com/quote/360754