[195] And why need I be prolix and dwell further on this subject, when I am called off by other more important points? If then, any one, leaving out of the question all other more remarkable subjects of speculation, were to choose to devote his time to an investigation of the subject here proposed, namely, to examine the education, and customs, and laws of every different nation, and country, and place, and city; of all subjects and rulers; of all men, whether renowned or inglorious, whether free or slaves, whether ignorant or endowed with knowledge, he would spend not one day or two, nor a month, nor even a year, but his whole life, even though he were to reach a great age, in the investigation; and he would nevertheless still leave a vast number of subjects unexamined, uninvestigated, and unmentioned, without perceiving it.