reading only makes us wiser , if we can question and voice it
I agree, north. Reading is only the beginning. If you read something you agree with you should be able to defend it against opposing viewpoints. And if you disagree with something, you should be able to articulate your case against it. That's why discussion and debate are so important. I've read numerous texts on economic theory, but because I never defended the texts against their critics, I forgot what all the points the books made were.
Even if the person with whom you're discussing a book has never read the book, he or she may still be able to point out something obvious that you have missed.