上句见：Day68
The Story of Philosophy的第69句：第1章Plato第1节The Context of Plato第5段第1句：

Traditions and dogmas rub one another down to a minimum in such centers of varied intercourse; where there are a thousand faiths we are apt to become skeptical of them all. Probably the traders were the first sceptic; they had seen too much to believe too much; and the general disposition of merchants to classify all men as either fools or knaves inclined them to question every creed. Gradually, too, they were developing science; mathematics grew with the increasing audacity of navigation. The growth of wealth brought the leisure and security which are the prerequisite of research and speculation; men now asked the stars not only for guidance on the seas but as well for an answer to the riddles of the universe; the first Greek philosophers were astronomers. “Proud of their achievement,” says Aristotle, “men pushed farther afield after the Persian wars; they took all knowledge for their province, and sought ever wider studies.” Men grew bold enough to attempt natural explanations of processes and events before attributed to supernatural agencies and powers; magic and ritual slowly gave way to science and control; and philosophy began.
浙江大学版本：传统和教条在这种多元文化频频冲撞的环境中相互制衡，维持在最低限度，因为面对一千种信仰的时候，我们往往哪一种也不愿相信。

解析

这句话讨论了传统和教条以及信仰在多元文化环境中的变化。传统和教条会减少到最小，而信仰会遭受普遍性的质疑。
1、‘Traditions and dogmas rub one another down to a minimum in such centers of varied intercourse;…’。这里用了比喻的方法。在这种多元文化交流的中心，传统和教条相互磨合，逐渐减少到最小。
dogma: usually disapproving : a belief or set of beliefs that is accepted by the members of a group without being questioned or doubted 教条；信条
Don't be trapped by dogma, which is living with the results of other people's thinking.不要被教条所迷惑，它诱使你按照他人的思维定式生活。——《乔布斯演讲》
rub: to move something (such as your hand or an object) back and forth along the surface of (something) while pressing 搓
Jerry's self-touch gesture is similar to Richard Nixon's hand rubbing during the Watergate investigations.杰瑞的自摸手势和理查德·尼克松在水门事件调查中的搓手动作有些相似。
[rub (someone or something) down or rub down (someone or something) : to rub (a person or animal's body) with your hands in order to clean, dry, or massage it 磨合
That door needs rubbing down before you paint it.那扇门需要打磨一下再上油漆。
intercourse： formal : communication and actions between people
So that real intercourse is between souls.因此真正的交流是灵魂的交流。

2、’... where there are a thousand faiths we are apt to become skeptical of them all.’。这句表达的是对信仰的态度。那里有上千种信仰，我们往往会对所有信仰都产生质疑。这里的“a thousand faiths”是一张夸张的说法，用来表示信仰的多样性。

在这种多元文化交流的中心，传统和教条相互磨合，逐渐减少到最小；同时那里有上千种信仰，我们往往会对它们都产生质疑。