“We hope you have not made the error of supposing that to criticize is always to disagree. (...) To agree is just as much of an exercise of critical judgment on your part as to disagree.”

“Is it too much to expect from the schools that they train their students not only to interpret but to criticize; that is, to discriminate what is sound from error and falsehood, to suspend judgement if they are not convinced, or to judge with reason if they agree or disagree?”

“To agree without understanding is inane. To disagree without understanding is impudent.”

“... The person who, at any stage of a conversation, disagrees, should at least hope to reach agreement in the end. He should be as much prepared to have his own mind changed as seek to change the mind of another ... No one who looks upon disagreement as an occasion for teaching another should forget that it is also an occasion for being taught.”

“If your friend wishes to read your 'Plutarch's Lives,' 'Shakespeare,' or 'The Federalist Papers,' tell him gently but firmly, to buy a copy. You will lend him your car or your coat - but your books are as much a part of you as your head or your heart.”

“A good book deserves an active reading. The activity of reading does not stop with the work of understanding what a book says. It must be completed by the work of criticism, the work of judging. The undemanding reader fails to satisfy this requirement, probably even more than he fails to analyze and interpret. He not only makes no effort to understand; he also dismisses a book simply by putting it aside and forgetting it. Worse than faintly praising it, he damns it by giving it no critical consideration whatever.”

“The complexities of adult life get in the way of the truth. The great philosophers have always been able to clear away the complexities and see simple distinctions - simple once they are stated, vastly difficult before. If we are to follow them we too must be childishly simple in our questions - and maturely wise in our replies..”