discipline of practice and the discipline of speculation.
The object of this discipline is not stability but progress. It has been urged in these pages, that there is no true stability. What looks like stability is a relatively slow process of atrophied decay. The stable universe is slipping away from under us. Our aim is upwards.
The men who made speculation effective were the Greek thinkers. We owe to them the progressive European civilization. It is therefore common sense to observe the methods which they introduced into the conduct of thought.
In the first place, they were unboundedly curious. They probed into everything, questioned everything, and sought to understand everything. This is merely to say that they were speculative to a superlative degree. In the second place, they were rigidly systematic both in their aim at clear definition and at logical consistency. In fact. they invented logic in order to be consistent. Thirdly, they were omnivorous in their interests — natural science, ethics. mathematics. political philosophy, metaphysics, theology, esthetics, and all alike attracted their curiosity. Nor did they keep these subjects rigidly apart. They very deliberately strove to combine them into one coherent system of ideas. Fourthly, they sought truths of the highest generality. Also in seeking these truths, they paid attention to the whole body of their varied interests. Fifthly, they were men with active practical interests.
