Speculative knowledge, however, does not increase of itself. It is not acquired without considerable effort; and people acquire it only because they strongly desire to do so. Such being the case, let us turn to another passage, taken likewise from the writings of Mill, and occurring in the very same chapter as that which has just been quoted. “_It would be a great error_,” says Mill, “_and one very little likely to be committed, to assert that speculation, intellectual activity, the pursuit of truth, is amongst the more powerful propensities of human nature, or holds a predominating place in the lives of any save decidedly exceptional individuals. But notwithstanding the relative weakness of this principle among other sociological agents, its influence is the main determining cause of social progress, all the other dispositions of our nature which contribute to that progress being dependent on it for accomplishing their share of the work_.” Now what does this passage mean? About its meaning, and the truth of its meaning, there can be no possible doubt; but it will be well to observe {135} the extraordinary confusion in which Mill involves what he means by his perverse manner of expressing it. In the first sentence of this last passage he tells us as clearly as possible that with regard to the pursuit of truth, and the power of discovering and understanding it, mankind are divided broadly into two classes—the great majority with whom the “_pursuit of truth_” and “_intellectual activity_” are “_slight propensities_,” and “_the decidedly exceptional individuals_” with whom these propensities are overmastering. But he has no sooner drawn this clear and all-important distinction between the two classes than he proceeds to undo his own work and mixes them together again in one unmeaning blur. He converts his statement that only “_the decidedly exceptional individuals_” desire truth with any great intensity, and have the faculties requisite for discovering it, into the statement that if we take “_the decidedly exceptional individuals_” and the majority together, and regard them as one body, which he calls “_mankind_,” we shall find that the average desire for truth is lukewarm, and the faculties for discovering it insufficient. He might just as well group Shakespeare with a hundred ordinary men; tell us that Shakespeare could write the greatest poetry the world has ever known, and that the hundred other men could write no poetry at all, and then convert these statements into the following—that the one hundred and one men, Shakespeare included, could only write poetry of a very moderate quality. {136}