[209] Stoicism and Epicureanism, as the matter is generally put, both substitute the practical good of man as an individual for the wisdom or the theoretical perfection that were contemplated by Plato and Aristotle as the highest objects of human pursuit. For Cicero, too, the chief problems of philosophy were in the main practical, the question whether virtue alone is sufficient for happiness, the problem of practical certainty as opposed to scepticism, the general belief in Providence and in immortality, and so on. And Lucretius thinks of the main service of philosophy as consisting in its power of emancipating the human mind from superstition. All this is quite typical of the essentially practical nature of the Roman character, of its conception of education as in the main discipline and duty, of its distrust of Greek intellectualism, and of its preoccupation with the necessities of the struggle for existence and for government, of its lack of leisure, and so on. I do not think that the very first thing about Pragmatism is its desire to return to a practical conception of life, although a tendency in this direction doubtless exists in it. [210] The idea that our “demonstrable knowledge is very short, if indeed we have any at all, although our certainty is as great as our happiness, beyond which we have no concernment to know or to be” (_Essay_, iv. 2–14); or Locke’s words: “I have always thought the actions of men the best interpreters of their thoughts.” [211] Schopenhauer, for example, used to be fond of repeating that his own philosophy (which took will to be the fundamental reality) was on its very face necessarily more of an ethic than a system like that of Spinoza, for example, which could only be called an ethic by a sort of _lucus a non lucendo_. [212] The Practical Reason to Aristotle is the reason that has to do with the pursuit of aims and ends, in distinction from the reason that has to do with knowledge, and the “universal” and science. This twofold distinction has given many problems to his students and to his commentators, and to succeeding generations. It is responsible for the entire mediæval and Renaissance separation of the intellectual life and the intellectual virtues from the practical life and the practical virtues.