Page:Researches into the Early History of Mankind and the Development of Civilization.djvu/392

382 ordinary ideas of Man and Nature held by educated men differ so widely. However far these ideas may in their turn be left behind, the growth which can be traced within the range of our own observation and inference, is one of no scant measure. It may bear comparison with one of the great changes in the mental life of the individual man, perhaps rather with the expansion and fixing of the mind which accompanies the passage from infancy into youth, than with the later steps from youth into manhood, or from manhood into old age.