The second impulsion, which may be named the _formal instinct_, issues from the absolute existence of man, or from his rational nature, and tends to set free, and bring harmony into the diversity of its manifestations, and to maintain personality notwithstanding all the changes of state. As this personality, being an absolute and indivisible unity, can never be in contradiction with itself, as _we are ourselves_ forever, this impulsion, which tends to maintain personality, can never exact in one time anything but what it exacts and requires forever. It therefore decides for always what it decides now, and orders now what it orders forever. Hence it embraces the whole series of times, or what comes to the same thing, it suppresses time and change. It wishes the real to be necessary and eternal, and it wishes the eternal and the necessary to be real; in other terms, it tends to truth and justice. If the sensuous instinct only produces _accidents_, the formal instinct gives laws, laws for every judgment when it is a question of knowledge, laws for every will when it is a question of action. Whether, therefore, we recognize an object or conceive an objective value to a state of the subject, whether we act in virtue of knowledge or make of the objective the determining principle of our state; in both cases we withdraw this state from the jurisdiction of time, and we attribute to it reality for all men and for all time, that is, universality and necessity. Feeling can only say: “That is true _for this subject_ and _at this moment_,” and there may come another moment, another subject, which withdraws the affirmation from the actual feeling. But when once thought pronounces and says: “_That is_,” it decides forever and ever, and the validity of its decision is guaranteed by the personality itself, which defies all change. Inclination can only say: “That is good _for your individuality_ and _present necessity_”; but the changing current of affairs will sweep them away, and what you ardently desire to-day will form the object of your aversion to-morrow. But when the moral feeling says: “That ought to be,” it decides forever. If you confess the truth because it is the truth, and if you practise justice because it is justice, you have made of a particular case the law of all possible cases, and treated one moment of your life as eternity. Accordingly, when the formal impulse holds sway and the pure object acts in us, the being attains its highest expansion, all barriers disappear, and from the unity of magnitude in which man was enclosed by a narrow sensuousness, he rises to the _unity of idea_, which embraces and keeps subject the entire sphere of phenomena. During this operation we are no longer in time, but time is in us with its infinite succession. We are no longer individuals but a species; the judgment of all spirits is expressed by our own, and the choice of all hearts is represented by our own act. LETTER XIII.