There are genuine mysteries in the world that mark the limits of human knowing and thinking. Wisdom is fortified, not destroyed, by understanding its limitations. Ignorance does not make a fool as surely as self-deception.

First, an angel is spiritually present at whatever place in physical space happens to be occupied by the body on which it acts. It can be present at that place without leaving Heaven which is its spiritual residence.

If you never ask yourself any questions about the meaning of a passage, you cannot expect the book to give you any insight you do not already possess.

Reading is a basic tool in the living of a good life.

The teacher's role in discussion is to keep it going along fruitful lines - be moderating, guiding, correcting and arguing like one more students.

Television, radio, and all the sources of amusement and information that surround us in our daily lives are also artificial props. They can give us the impression that our minds are active, because we are required to react to stimuli from the outside. But the power of those external stimuli to keep us going is limited. They are like drugs. We grow used to them, and we continuously need more and more of them. Eventually, they have little or no effect. Then, if we lack resources within ourselves, we cease to grow intellectually, morally, and spiritually. And we we cease to grow, we begin to die.

Wonder is the beginning of wisdom in learning from books as well as from nature.