In Aristotelian terms, the good leader must have ethos, pathos and logos. The ethos is his moral character, the source of his ability to persuade. The pathos is his ability to touch feelings to move people emotionally. The logos is his ability to give solid reasons for an action, to move people intellectually.

The best protection against propaganda of any sort is the recognition of it for what it is. Only hidden and undetected oratory is really insidious. What reaches the heart without going through the mind is likely to bounce back and put the mind out of business. Propaganda taken in that way is like a drug you do not know you are swallowing. The effect is mysterious; you do not know afterwards why you feel or think the way you do.

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.

Sin is not only manifested in certain acts that are forbidden by divine command. Sin also appears in attitudes and dispositions and feelings. Lust and hate are sins as well as adultery and murder. And, in the traditional Christian view, despair and chronic boredom - unaccompanied by any vicious act - are serious sins. They are expressions of man's separation from God, as the ultimate good, meaning, and end of human existence.

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.

A lecture has been well described as the process whereby the notes of the teacher become the notes of the student without passing through the mind of either.

We are selfish when we are exclusively or predominantly concerned with the good for ourselves. We are altruistic when we are exclusively or predominantly concerned with the good of others.