type of thinking was very widely diffused, and the modes of speech which it developed naturally penetrated, in more or less modified meanings, much more deeply into the life and language of the people than the conceptions these modes of speech were invented to express. All terms of this sort have their roots in some system of thought, but come to those who ultimately employ them with a varied history behind them, in the course of which they have lost much of the shades of suggestion with which they