text: Since, therefore, philosophy is threefold, let us first begin to set in order the moral side. It has been agreed that this should be divided into three parts. First, we have the speculative part, which assigns to each thing its particular function and weighs the worth of each; it is highest in point of utility. For what is so indispensable as giving to everything its proper value? The second has to do with impulse, the third with actions. For the first duty is to determine severally what things are worth; the second, to conceive with regard to them a regulated and ordered impulse; the third, to make your impulse and your actions harmonize, so that under all these conditions you may be consistent with yourself. If any of these three be defective, there is confusion in the rest also. For what benefit is there in having all things appraised, each in its proper relations, if you go to excess in your impulses? What benefit is there in having checked your impulses and in having your desires in your own control, if when you come to action you are unaware of the proper times and seasons, and if you do not know when, where, and how each action should be carried out? It is one thing to understand the merits and the values of facts, another thing to know the precise moment for action, and still another to curb impulses and to proceed, instead of rushing, toward what is to be done. Hence life is in harmony with itself only when action has not deserted impulse, and when impulse toward an object arises in each case from the worth of the object, being languid or more eager as the case may be, according as the objects which arouse it are worth seeking.