Multitudes are unqualified for a constant and warm reciprocation of benevolence, as they are incapacitated for any other elevated excellence, by perpetual attention to their interest, and unresisting subjection to their passions. Long habits may superinduce inability to deny any desire, or repress, by superior motives, the importunities of any immediate gratification, and an inveterate selfishness will imagine all advantages diminished in proportion as they are communicated. But not only this hateful and confirmed corruption, but many varieties of disposition, not inconsistent with common degrees of virtue, may exclude friendship from the heart. Some ardent enough in their benevolence, and defective neither in officiousness nor liberality, are mutable and uncertain, soon attracted by new objects, disgusted without offence, and alienated without enmity. Others are soft and flexible, easily influenced by reports or whispers, ready to catch alarms from every dubious circumstance, and to listen to every suspicion which envy and flattery shall suggest, to follow the opinion of every confident adviser, and move by the impulse of the last breath. Some are impatient of contradiction, more willing to go wrong by their own judgment, than to be indebted for a better or a safer way to the sagacity of another, inclined to consider counsel as insult, and inquiry as want of confidence, and to confer their regard on no other terms than unreserved submission, and implicit compliance. Some are dark and involved, equally careful to conceal good and bad purposes; and pleased with producing effects by invisible means, and shewing their design only in its execution. Others are universally communicative, alike open to every eye, and equally profuse of their own secrets and those of others, without the necessary vigilance of caution, or the honest arts of prudent integrity, ready to accuse without malice, and to betray without treachery. Any of these may be useful to the community, and pass through the world with the reputation of good purposes and uncorrupted morals, but they are unfit for close and tender intimacies. He cannot properly be chosen for a friend, whose kindness is exhaled by its own warmth, or frozen by the first blast of slander; he cannot be a useful counsellor who will hear no opinion but his own; he will not much invite confidence whose principal maxim is to suspect; nor can the candour and frankness of that man be much esteemed, who spreads his arms to humankind, and makes every man, without distinction, a denizen of his bosom.