The first moments of man are marked by his wants; that is to say, the first impulse he receives is to conserve his existence; this he would not be able to maintain without the concurrence of many analogous causes: these wants in a sensible being, manifest themselves by a general languor, a sinking, a confusion in his machine, which gives him the consciousness of a painful sensation: this derangement subsists, is even augmented, until the cause suitable to remove it re-establishes the harmony so necessary to the existence of the human frame. Want, therefore, is the first evil man experiences; nevertheless it is requisite to the maintenance of his existence. Was it not for this derangement of his body, which obliges him to furnish its remedy, he would not be warned of the necessity of preserving the existence he has received. Without wants man would be an insensible machine, similar to a vegetable; like that he would be incapable of preserving himself; he would not be competent to using the means required to conserve his being. To his wants are to be ascribed his passions; his desires; the exercise of his corporeal functions; the play of his intellectual faculties: they are his wants that oblige him to think; that determine his will, that induce him to act; it is to satisfy them or rather to put an end to the painful sensations excited by their presence, that according to his capacity, to the natural sensibility of his soul, to the energies which are peculiar to himself, he gives play to his faculties, exerts the activity of his bodily strength, or displays the extensive powers of his mind. His wants being perpetual, he is obliged to labour without relaxation, to procure objects competent to satisfy them. In a word, it is owing to his multiplied wants that man's energy is kept in a state of continual activity: as soon as he ceases to have wants, he falls into inaction--becomes listless--declines into apathy--sinks into a languor that is incommodious to his feelings or prejudicial to his existence: this lethargic state of weariness lasts until new wants, by giving him fresh activity, rouse his dormant faculties--throw off his stupor--re-animate his vigour, and destroy the sluggishness to which he had become a prey.