suggest many things to your observation, which

might otherwise escape you; and your own observations upon mankind, when compared with those which you will find in books, will help you to fix the true point. [November, 1746.]

Old Fools.—To know mankind well requires full as much attention and application as to know books, and, it may be, more sagacity and discernment. I am, at this time, acquainted with many elderly people, who have all passed their whole lives in the great world, but with such levity and inattention, that they know no more of it now than they did at fifteen. [Same date.]

Introspection.—You must look into people, as well as at them. Almost all people are born with all the passions, to a certain degree; but almost every man has a prevailing one, to which the others are subordinate. Search every one for that ruling passion; pry into the recesses of his heart, and observe the different workings of the same passion in different people. And, when you have found out the prevailing passion of any man, remember never to trust him, where that passion is concerned. Work upon him by it, if you please; but be upon your guard yourself against it, whatever professions he may make you. [Same date.]