A. The same difference as between him who frankly avows his blindness and the blind man who pretends to sight; silliness is the reality of ignorance, to which is superadded the vanity of knowledge. Q. Are ignorance and silliness common? A. Yes, very common; they are the usual and general distempers of mankind: more than three thousand years ago the wisest of men said: "The number of fools is infinite;" and the world has not changed. Q. What is the reason of it? A. Because much labor and time are necessary to acquire instruction, and because men, born ignorant and indolent, find it more convenient to remain blind, and pretend to see clear. Q. What difference is there between a learned and a wise man? A. The learned knows, and the wise man practices. Q. What is prudence? A. It is the anticipated perception, the foresight of the effects and consequences of every action; by means of which foresight, man avoids the dangers which threaten him, while he seizes on and creates opportunities favorable to him: he thereby provides for his present and future safety in a certain and secure manner, whereas the imprudent man, who calculates neither his steps nor his conduct, nor efforts, nor resistance, falls every instant into difficulties and dangers, which sooner or later impair his faculties and destroy his existence. Q. When the Gospel says, "Happy are the poor of spirit," does it mean the ignorant and imprudent? A. No; for, at the same time that it recommends the simplicity of doves, it adds the prudent cunning of serpents. By simplicity of mind is meant uprightness, and the precept of the Gospel is that of nature. CHAPTER VI. ON TEMPERANCE. Q. What is temperance? A. It is a regular use of our faculties, which makes us never exceed in our sensations the end of nature to preserve us; it is the moderation of the passions. Q. Which is the vice contrary to temperance? A. The disorder of the passions, the avidity of all kind of enjoyments, in a word, cupidity. Q. Which are the principal branches of temperance? A. Sobriety, and continence or chastity. Q. How does the law of nature prescribe sobriety? A. By its powerful influence over our health. The sober man digests with comfort; he is not overpowered by the weight of aliments; his ideas are clear and easy; he fulfills all his functions properly; he conducts his business with intelligence; his old age is exempt from infirmity; he does not spend his money in remedies, and he enjoys, in mirth and gladness, the wealth which chance and his own prudence have procured him. Thus, from one virtue alone, generous nature derives innumerable recompenses. Q. How does it prohibit gluttony?