One of the more lively passages is an attack on Democritus’ “void”: there can be no void or vacuum in nature, says Aristotle, for in a vacuum all bodies would fall with equal velocity; this being impossible, “the supposed void turns out to have nothing in it”—an instance at once of Aristotle’s very occasional humor, his addiction to unproved

Aristocracy ruins itself by limiting too narrowly the circle within which power is confined; oligarchy ruins itself by the incautious scramble for immediate wealth. In either case the end is revolution.

Therefore the essence of a higher education is the search for Ideas: for generalizations, laws of sequence, and ideals of development; behind things we must discover their relation and meaning, their mode and law of operation, the function and ideal they serve or adumbrate; we must classify and coördinate our sense experience in terms of law and

an agricultural population is inclined to supernatural belief by its helpless dependence on the caprice of the elements, and by that inability to control nature which always leads to fear and thence to worship; when industry and commerce developed, a new type of mind and man arose, more realistic and terrestrial, and the power of the Church began

Human behavior, says Plato, flows from three main sources: desire, emotion, and knowledge. Desire, appetite, impulse, instinct—these are one; emotion, spirit, ambition, courage—these are one; knowledge, thought, intellect, reason—these are one.

One always feels towards logic as Virgil bade Dante feel towards those who have been damned because of their colorless neutrality: Non ragionam di lor, ma guarda e passa—“Let us think no more about them, but look once and pass on.”

The mathematical reader will see at once that the structure of the syllogism resembles the proposition that two things equal to the same thing are equal to each other; if A is B, and C is A, then C is B. As in the mathematical case the conclusion is reached by canceling from both premisses their common term, A; so in our syllogism the conclusion is

Plato believes that a nation cannot be strong unless it believes in God. A mere cosmic force, or first cause, or élan vital, that was not a person, could hardly inspire hope, or devotion, or sacrifice; it could not offer comfort to the hearts of the distressed, nor courage to embattled souls. But a living God can do all this, and can stir or

Men are not content with a simple life: they are acquisitive, ambitious, competitive, and jealous; they soon tire of what they have, and pine for what they have not; and they seldom desire anything unless it belongs to others. The result is the encroachment of one group upon the territory of another, the rivalry of groups for the resources of the