"It is common sense," says the philosopher, "which forces us at a banquet to raise our eyes to the hour-glass to find out how late it is. "It is under the inspiration of this great quality of mind that we shall avoid putting to our lips the cup already emptied many times. "Common sense will reflect upon the mirror of our imagination the specter of the day after the orgy; it will evoke the monster of the headache which works upon the suffering cranium with its claws of steel; and, at some future day, it will show us precocious decrepitude as well as all bodily ills which precede the final decay of those who yield to their passions. It will also impose upon us the performance of duty under the form which it has adopted for each individual. "Common sense represents for some the care of public affairs; for others those of the family; for us all the great desire to leave intact to our descendants the name which we have received from our fathers. "For some of those still very young, it is like a lover long desired! "For sages and warriors, it blows the trumpet of glory. "Finally, common sense is the chosen purpose of every one, courted, demanded, desired or accepted, but it exists, and under the penalty of most serious inconveniences it does not permit us to forget its existence." Coming down from the heights where he allows himself to be transported at times for a brief moment, Yoritomo tells us the part played by common sense with reference to health. "Common sense" he assures us, "is the wisest physician whom it is possible to consult. "If we followed its advice, we should avoid the thousand and one little annoyances of illnesses caused by imprudence. "The choice of clothing would be regulated according to the existing temperature. "One would avoid the passing at once from extreme heat to extreme cold. "One would never proffer this stupid reflection: Bah! I shall take care of myself, which impudent people declare when exposing themselves carelessly to take cold. "We should understand that disease is a cause of unparalleled disorder and discord. "In addition to the thought of possible sufferings, that of grief for those whom we love, joined to the apprehension of a cessation of social functions, on whose achievement depends our fortune, would suffice to eliminate all idea of imprudence, if we had the habit of allowing common sense to participate in all our actions of daily life. "To those who walk under its guidance; it manifests itself without ceasing; it dominates all actions without their being compelled to separate themselves from it. "It is unconsciously that they appeal to common sense and they have no need of making an effort to follow its laws. "Common sense is the intelligence of instinct." LESSON VII POWER OF DEDUCTION Before entering the path which relates directly to the intellectual efforts concerning the acquisition of common sense, the Shogun calls our attention to the power of deduction.