23. As I would not have you trust too implicitly to a man, because the world gives him a good character; so I must particularly caution you against those who speak well of themselves. In general, suspect those who boast of or affect to have any one virtue above all others, for they are commonly impostors. There are exceptions, however, to this rule, for we hear of prudes that have been made chaste, bullies that have been brave, and saints that have been religious. Confide only where your own observation shall direct you; observe not only what is said, but how it is said, and if you have penetration, you may find out the truth better by your eyes than your ears; in short, never take a character upon common report, but enquire into it yourself; for common report, though it is right in general, may be wrong in particulars.
24. Beware of those who, on a slight acquaintance, make a tender of their friendship, and seem to place a confidence in you; 'tis ten to one but they deceive and betray you: however, do not rudely reject them upon such a supposition; you may be civil to them, though you do not entrust them. Silly men are apt to solicit your friendship, and unbosom themselves upon the first acquaintance: such friends cannot be worth hearing, their friendship being as slender as their understanding; and if they proffer their friendship with a design to make a property of you, they are dangerous acquaintance indeed.
25. Not but the little friendships of the weak may be of some use to you, if you do not return the compliment; and it may not be amiss to seem to accept those of designing men, keeping them, as it were, in play, that they may not be openly your enemies; for their enmity is the next dangerous thing to their friendship. We may certainly hold their vices in abhorrence, without being marked out as their personal enemy. The general rule is to have a real reserve with almost every one, and a seeming reserve with almost no one; for it is very disgusting to seem reserved, and very dangerous not to be so. Few observe the true medium. Many are ridiculously misterious upon trifles and many indiscreetly communicative of all they know.
26. There is a kind of short-lived friendship that takes place among young men, from a connection in their pleasures only; a friendship too often attended with bad consequences. This companion of your pleasures, young and unexperienced, will probably, in the heat of convivial mirth, vow a perpetual friendship, and unfold himself to you without the least reserve; but new associations, change of fortune, or change of place, may soon break this ill-timed connection, and an improper use may be made of it.
27. Be one, if you will, in young companies, and bear your part like others in the social festivity of youth; nay, trust them with your innocent frolics, but keep your serious matters to yourself; and if you must at any time make them known, let it be to some tried friend of great experience; and that nothing may tempt him to become your rival, let that friend be in a different walk of life from yourself.
Were I to hear a man making strong protestations, and swearing to the truth of a thing, that is in itself probable, and very likely to be, I shall doubt his veracity; for when he takes such pains to make me believe it, it cannot be with a good design.
28. There is a certain easiness or false modesty in most young people, that either makes them unwilling, or ashamed to refuse any thing that is asked of them. There is also an unguarded openness about them, that makes them the ready prey of the artful and designing. They are easily led away by the feigned friendships of a knave or a fool, and too rashly place a confidence in them, that terminates in their loss, and frequently in their ruin. Beware, therefore, as I said before, of these proffered friendships; repay them with compliments, but not with confidence. Never let your vanity make you suppose that people become your friends upon a slight acquaintance: for good offices must be shewn on both sides to create a friendship; it will not thrive, unless its love be mutual; and it requires time to ripen it.
29. There is still among young people another kind of friendship merely nominal, warm indeed for the time, but fortunately of no long continuance. This friendship takes its rise from their pursuing the same course of riot and debauchery; their purses are open to each other, they tell one another all they know, they embark in the same quarrels, and stand by each other on all occasions. I should rather call this a confederacy against good morals and good manners, and think it deserves the severest lash of the law; but they have the impudence to call it friendship. However, it is often as suddenly dissolved as it is hastily contracted; some accident disperses them, and they presently forget each other, except it is to betray and laugh at their own egregious folly.
In short, the sum of the whole is, to make a wide difference between companions and friend; for a very agreeable companion has often proved a very dangerous friend.