3. Pythagorean Astronomy, [52]
Historical Retrospect, [53]
CHAPTER IV. The Anthropological Period: The Philosophy of Man, [55]
An Historical Summary of the Anthropological Period, [55]
The Persian Wars and the Rise of Athens, [56]
The Greek Enlightenment, [58]
1. The Impulse for Learning, [58]
2. The Practical Need of Knowledge, [59]
3. The Critical Attitude of Mind, [61]
The Significance of the Sophists, [64]