Reference: https://www.cnblogs.com/qi09/archive/2012/02/10/2344964.html
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>>> f = open('E:/序言.txt','r')
>>> for line in f.readlines():
... print(line)
...
Preface to the American Edition
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There are already quite a few histories of philosophy, and it is not my intention to add just one to them. My purpose is to reveal that philosophy is an integral part of social and political life: it is not the isolated thinking of prominent individuals, but the product of social characters in which systems have prevailed and cause. This purpose requires us to tell more about history in general than is usually done by historians of philosophy. I also find this to be especially necessary for periods when the average reader may not be very familiar. The great age of scholasticism was the product of eleventh-century reforms, and these reforms were a reaction to the decadence and corruption of the preceding period. It is difficult to understand the intellectual atmosphere of the twelfth and thirteenth centuries without some knowledge of the centuries between the fall of Rome and the rise of the medieval clergy. In dealing with this period, as with other periods, my aim is only to provide--insofar as the epochs in which the philosophers were made, and the epochs in which the philosophers were formed and powerful,-- I think it is the general history that needs to be described if one is to have a sympathetic understanding of the philosopher.