Pride,ill nature and want of sense are the three great sources of ill manners是什么意思？

傲慢，虐待性质和希望的感觉是三个伟大的来源的虐待方式

骄傲自大，性情乖癖，缺乏理性是失礼的三大根源。
看看原文吧:
Pride, ill nature, and want of sense, are the three great sources of ill manners; without some one of these defects, no man will behave himself ill for want of experience; or of what, in the language of fools, is called knowing the world.
I defy anyone to assign an incident wherein reason will not direct us what we are to say or do in company, if we are not misled by pride or ill nature.
骄傲自大，性情乖癖，缺乏理性是失礼的三大根源。如果能根除这些弊病，没有人会因为缺乏经验，或者，如某些愚人所说，因为谙于世故而有失礼貌的。
我敢说任何人能举出一个事例来说明，要不是受到骄傲情绪或坏脾气的舞蹈，理智总会指引我们与人交往时谈吐得体，举止适度。

骄傲自大，性情怪癖，缺乏理性是失礼的三大根源。

great应译作主要的，重大的。ill nature为恶毒的
傲慢、恶毒和欲望是病态行为的三大源头。