Mortimer J. Adler Quotes

The telephone book is full of facts but it doesn't contain a single idea.

In the case of good books the point is not to see how many of them you can get through but rather how many can get through to you.

The trouble is that many people regard disagreement as unrelated to either teaching or being taught. They think that everything is just a matter of opinion. I have mine, and you have yours; and our right to our opinions is as inviolable as our right to private property. On such a view, communication cannot be profitable if the profit to be gained is an increase in knowledge. Conversation is hardly better than a ping-pong game of opposed opinions, a game in which no one keeps score, no one wins, and everyone is satisfied because he does not lose - that is, he ends up holding the same opinions he started with.

... always keep in mind that an article of faith is not something that the faithful assume. Faith, for those who have it, is the most certain form of knowledge, not a tentative opinion.

We are not told, or not told early enough so that it sinks in, that mathematics is a language, and that we can learn it like any other, including our own. We have to learn our own language twice, first when we learn to speak it, second when we learn to read it. Fortunately, mathematics has to be learned only once, since it is almost wholly a written language.

The reader tries to uncover the skeleton that the book conceals. The author starts with the skeleton and tries to cover it up. His aim is to conceal the skeleton artistically or, in other words, to put flesh on the bare bones. If he is a good writer, he does not bury a puny skeleton under a mass of fat; on the other hand, neither should the flesh be too thin, so that the bones show through. If the flesh is thick enough, and if the flabbiness is avoided, the joints will be detectable and the motion of the parts will reveal the articulation.

Enlightenment is achieved only when, in addition to knowing what an author says, you know what he means and why he says it.

You must be able to say "I understand," before you can say "I agree," or "I disagree," or "I suspend judgment.